ADU 101

What Makes The Best ADU Design?

The Accessory Dwelling Unit (ADU) has emerged as a transformative force in modern housing, offering homeowners opportunities for additional income, flexible living space, and even multigenerational living. But amidst the excitement, a crucial question arises: what makes the best ADU design?

There's no one-size-fits-all answer, as the ideal ADU blends seamlessly with the characteristics of your property, your project budget, and the intended use of the ADU. However, certain key principles guide the creation of exceptional ADUs:

1. Functionality Reigns Supreme:

Start by defining your vision. Will the ADU serve as a rental unit, home office, in-law suite, or guest quarters? Each purpose demands distinct functionalities. Prioritize essential features like the number of bedrooms and bathrooms, size and layout of kitchens and living areas, carefully considering occupant needs and space limitations. Utilize space-saving solutions like built-in storage, convertible furniture, and open floor plans to maximize every square foot.

2. Embrace the Power of Design Flexibility:

Don't be confined by conventional layouts. Explore various ADU plan options online, including pre-designed blueprints or customizable ADU floor plan templates. These resources offer a springboard for inspiration, allowing you to adapt and tailor the design to your specific needs. Remember, flexibility doesn't compromise style. Look for plans that integrate with your personal style and taste, or your existing home's architectural style, creating a cohesive aesthetic.

3. Invest in Sustainability:

A well-designed ADU is not only functional and stylish, but also environmentally conscious. Consider incorporating energy-efficient features like solar panels, water-saving fixtures, low-energy lighting and other systems, and recycled and locally sourced materials when possible. These choices not only benefit the environment, but also reduce your long-term operational costs. Remember, sustainable design is an investment in your future and the planet's.

4. Let Natural Light Flow:

In any living space, natural light is essential for well-being and creating a sense of spaciousness. Opt for generous windows, skylights, and strategically placed light sources to illuminate your ADU. This design element not only enhances aesthetics, but also promotes mental and physical health. It can also reduce your electric bill.

5. Don't Neglect Outdoor Connections:

Every ADU benefits from a connection to the outdoors. Include a private patio, deck, or balcony for occupants to enjoy fresh air and natural surroundings. This outdoor space can become a haven for relaxation, entertainment, or even gardening, further expanding the living experience. With the smaller square footage of ADUs, outdoor living space can make them feel and act larger then they are.


Ready to Transform Your Vision into Reality?

While these principles provide a roadmap, crafting the perfect ADU requires expert guidance. Consider partnering with experienced architects, designers, and builders who specialize in ADU construction. Their expertise can ensure regulatory compliance, structural integrity, and aesthetic harmony, transforming your vision into a functional and beautiful reality.

Investing in an ADU is a wise decision, unlocking both personal and financial benefits. By incorporating these design principles and seeking professional guidance, you can turn your ADU into an asset that enriches your life and property for years to come.

Start your ADU journey today! Explore our comprehensive database of ADU plans and connect with qualified professionals to bring your dream to life.


 

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One of the most popular ADU designs on the internet is available for purchase. What makes this the best ADU design? The ADU plan is simple yet functional. The design is both modern yes practical and affordable. People love the covered outdoor space, the large windows, and the large open great room making the ADU interior design both beautiful and functional.

Features of The Best ADU Designs

What makes one ADU design better than another? Lessons learned from designing over 60 custom ADUs and offering award winning pre-designed ADUs has lead us to some fundamentals in good ADU design. Designing the best ADU for your property requires careful planning, consideration of your needs, and the help of an experienced design team. Through years of experience we have crafted beautiful and functional ADUs that are some of the best available plans on the market. In this blog post, we'll explore what makes the best ADU design.

  1. Functionality and Flow

    The best ADU designs take into account the function and flow of the space. A well-designed ADU should feel spacious and open, with well-defined areas for living, sleeping, and cooking. The layout should flow smoothly from one area to another, and provide ample storage space. The design should also take into account the specific needs of the inhabitants, such as mobility and accessibility requirements. Since ADUs are smaller homes, it is imperative that their layouts are efficient and functional.

  2. Energy Efficiency

    Another important aspect of the best ADU design is energy efficiency. An ADU that is built with energy-efficient materials and features can save you money on your utility bills and reduce your environmental impact. Features such as continuous insulation, low-flow fixtures, and energy-efficient appliances can help you save on energy costs, while also making your space more comfortable and sustainable. Passive strategies like sun shading, natural light, thermal mass and other features are things that a great ADU design can incorporate.

  3. Integration with the Existing Property

    The best ADU design is one that seamlessly integrates with the existing property. A well-designed ADU should complement, but not necessarily mimic, the style and character of the main home, while also providing a unique and independent living space. It's important to consider the landscaping and outdoor areas when designing an ADU, so that the entire property looks cohesive and well-designed.

  4. Privacy and Comfort

    Privacy and comfort are also important aspects of the best ADU design. The design should take into account the privacy needs of the inhabitants, as well as provide a comfortable and relaxing living space. This can be achieved through the use of soundproofing materials, adequate lighting, and comfortable furnishings. This is important both in terms of the interior design of the ADU, providing privacy between spaces, as well as between the ADU and the main house.

  5. Flexibility and Adaptability

    Finally, the best ADU design should be flexible and adaptable to changing needs. An ADU that can be easily modified or repurposed as your needs change can save you money and hassle in the long run. The design should take into account the possibility of future modifications, such as adding or removing walls, or changing the use of the space - perhaps from a rental unit to a home office, or from a guest suite to a home for an aging parent. One of the true benefits of an ADU is that they can be used for so many things over the years.

In conclusion, the best ADU design is one that takes into account functionality, energy efficiency, integration with the existing property, privacy and comfort, and flexibility and adaptability. By working with an experienced design team, you can create an ADU that meets your specific needs and enhances the value of your property.

The design locates the large floor to ceiling windows overlooking the trees in the backyard, providing great views into nature but lots of privacy from the surrounding houses.


How Long Does It Take To Build An ADU?

After cost, timeline is one of the most commonly asked questions by those looking to add an ADU to their property. It is important to understand the full project timeline and not just the construction phase as you begin to plan your project.

Projects can typically be broken down into 4 phases:

  1. Planning and Research

  2. Design

  3. Permitting and Approvals

  4. Construction


The Planning and Research Phase: 4-8 weeks but potentially longer

This is vital to having a successful project as it is always easier and cheaper to make decisions on paper than when the project is under construction. It is also important to have the base research done to understand and accommodate the wide range of factors that will impact the project, from local rules and regulations, material supply availability, cost of materials and labor, interest rates and other financing information, to the specifics of the existing conditions of the property.

The length of time for this phase can vary from a few weeks to a few years depending on the client and how motivated they are to move forward with the project. When clients come to us to assist with this work, we typically estimate about 4 weeks to review the property, understand the local rules and regulations, and work with the client to develop a project budget and building program.

The ADU Design Phase: 3-6 months but sometimes up to a year

A common theme in all of these rough timeframe estimates will be that it depends on the client. Some people are quick to make decisions or just trust the design team to make decisions for them. Others want to be involved with the specifics of each decision throughout the project or may need a good amount of time to think through the options before settling on what they want to do.

We typically walk clients through a custom designed ADU process in 3-4 months. We feel that is a good balance of collaborating on the important decisions while our expert designers handle the details as we develop the permitting and construction drawings. You can then add on another month or two for the various other consultants that may need to be involved in the project. This would be consultants such as structural, mechanical, electrical, and plumbing engineers, landscape architects, arborists, civil engineers and other professionals. Most of these consultants will need the architectural design to be complete before they can carry out their work.

This is a place that starting with a pre-designed ADU plan can save significant time. If you are ok with one of the designs that are available for purchase, you can condense 3-4 months into just a couple of weeks. You would basically be skipping most of the design work and moving straight into engaging with consultants.

The Permitting and Approvals Phase: 1 month to 1 year, or more!

That range may seem crazy and we agree. This is one of the biggest frustrations homeowners, designers, and builders of ADUs have in the process. Each jurisdiction has their own rules and regulations and often there are conflicting rules between towns/cities, counties, and states. It is challenging to work through the various levels of regulation. Adding further frustration is how slow most building departments are at responding to questions as well as reviewing and approving submitted plan sets.

For some specific examples, we found that it took about 4-6 months on average to work through the permitting process in Portland, Oregon. Places in the Bay Area, like San Francisco, Berkeley, Oakland and others, the process could easily stretch out to one year or more. Seattle also has incredibly long review processes, probably falling somewhere between Portland and the Bay Area. Smaller towns or states with less regulation often work a lot faster. Places like Idaho or Texas can review and approve ADUs in just a few weeks or months, assuming the town you are building in allows ADUs, and the designs meet the local codes.

We highly recommend talking with your local building department as part of your Planning and Research phase, to get a realistic estimate of the permitting time you can expect.

The Construction Phase: 6-9 months

Once you receive approved plans from the permitting process you can break ground and start construction. From this point you could probably assume a 6-9 month construction timeframe. Of course this could vary based on your local climate, material supply, labor market, etc. Also, some contractors have larger crews and may move quicker. You may also chose to work with someone who will take their time and be a bit more meticulous with the construction details to deliver a higher quality final result. Sometimes taking longer is prefered.

Remember a few key things: starting construction in the spring is ideal as you will hopefully avoid delays due to winter climate conditions (freezing cold, snow and ice, and heavy rains can delay construction significantly). In the post covid world, material supply chain and skilled labor are significant challenges to overcome. There are significant delays in getting some key building materials, especially windows, that could significantly extend the construction timeframe.

The construction timeline for building an ADU can also vary based on the type of ADU. Converting a basement or attic, or even a garage could potentially be a bit quicker to complete vs doing a ground up construction. Working within an existing structure - assuming it is weather protected - may not face climate caused delays and also may reduce some of the work such as pouring foundations or doing significant framing.


Overall ADU Timeline

If you are just beginning to consider adding an ADU a good safe estimate is it would take about 12-18 months from start to finish. That would include pre-design research, the architectural design phase, permitting approvals, and construction. Of course some jurisdictions - I’m look at you Bay Area - will probably throw some wrenches in the gears and take too long to review your project and issue permits, so it could take longer.

To bring this timeframe down you can consider strategies like starting with a pre-designed ADU, or even an prefabricated or modular ADU. It is also wise to plan for a a springtime construction start, and to hire your design team and general contractor well in advance so they can collaborate and plan for a successful construction process. The best time to start design would be late summer or early fall with the goal of starting construction the following spring or summer.

If you are starting a project and have any questions don’t hesitate to reach out. We are always happy to help you get on the right track. And if you want to cut down on your timeline and want to start with a pre-designed ADU plan check out our available designs by clicking the button below.

Building an ADU - What to know before you break ground

If you are considering building an ADU (accessory dwelling unit), there are several important things to consider before you break ground.

  1. Research local regulations and requirements. ADU regulations and requirements can vary depending on the location of the property, so it is important to research and understand the specific regulations and requirements that apply to your property. This may include obtaining the necessary permits, meeting certain zoning and building code requirements, and following any other applicable regulations.

  2. Determine the design of the ADU. The size and design of the ADU will depend on factors such as the size of the property, the intended use of the unit, and any local regulations or requirements. It may be helpful to work with a qualified professional, such as an architect or designer, to develop a plan that meets your needs and complies with local regulations. Alternatively, starting with a pre-designed ADU Plan can be an option to save time and money.

  3. Consider the cost of construction and financing options. Building an ADU can be a significant investment, so it is important to consider the costs involved and determine how you will finance the construction. This may include securing a loan, using savings, or seeking financial assistance from a government program.

  4. Choose a contractor. Once you have an ADU plan in place, you will need to choose a contractor to handle the construction of the ADU. It is important to research and compare contractors to ensure that you choose one that is qualified, experienced, and reputable.

  5. Consider the ongoing maintenance and operating costs of the ADU. Once the ADU is built, you will need to consider the ongoing maintenance and operating costs of the unit. This may include costs such as utilities, property taxes, insurance, and repairs. It is wise to plan for this in advance and work with your designer or builder to select low-maintenance long-lasting materials and systems.

  6. Set the timeline. Build and ADU takes a long time - months or even years depending on the size, complexity and location. Work with your general contractor to set a construction schedule and plan for any complexities and risks. Also plan some contingency as nothing works out exactly to plan.

  7. Involve your designer throughout construction. Drawings are a guide for builders to follow but can never have every detail and situation covered. Having your designer involved in the construction process can help avoid errors, answer questions, work through challenges, and ultimately save money. It is always cheaper to make revisions on paper before things are built. When contractor’s have questions it is best to consult with your design team to help solve the problem. The design fees during construction will be much less than fixing things that were built incorrectly.

  8. Hire a professional. Experienced designers and builders are more than worth their fees. They know how to get things done to a high quality and can guide you through the hundreds of decisions along the way. They also have relationships with other consultants that will be needed throughout the process. Although some people may be successful DIYing an ADU project, considering the amount of work it will take and time it will absorb, it is a great investment to hire professionals who can avoid mistakes, and keep the project on budget and on schedule.

Overall, building an ADU can be a rewarding investment, but it is important to carefully consider all of the factors involved before breaking ground. By researching local regulations, determining the size and design of the ADU, considering the costs involved, and planning for ongoing maintenance and operating costs, and hiring an expert team, you can ensure that your ADU project is successful.

What Is An ADU?

Definition of ADU (Accessory Dwelling Unit)

Although they are called by many names depending on where you live, an ADU, which stands for Accessory Dwelling Unit, is a second home that is located on the same property as a primary residence. More and more cities are now allowing ADUs to go with main houses thus providing more housing in our neighborhoods without creating more sprawl. Primarily ADUs are located on residential properties that are zoned for single family housing, although the can also include living spaces in basement apartments or additional units on some multi-family properties.

Accessory Dwelling Units can take many forms as we will discuss below, but they need a few basic elements to be considered a full dwelling. Each ADU must have a kitchen, bathroom, living space, and sleeping space to be considered an ADU. They are full stand-alone dwellings that can provide everything someone would need to live in the unit long term. Basically they are smaller houses, typically limited in size and height by local zoning regulations.

View of a backyard detached ADU we designed on Bainbridge Island, Washington. Detached ADUs are the best option for rental units or for aging-in-place.


Types of ADUs

There are a range of options for creating ADUs on a particular property. These include building a detached ADU as a stand-alone structure, our preferred option. You can also build an accessory dwelling unit as an addition to your existing house, sharing a wall. Renovating a basement into an ADU is common, as-is converting an existing garage into a living unit. I have seen a few attics converted into ADUs, although creating a separate entrance can be challenging. I have even worked on a couple of projects to carve out parts of a client’s main house into an ADU, dividing it into two dwelling units under one roof. I have also designed ADUs over garages which is a very common request, especially in urban locations where off-street parking is desirable.

Although there are many options, and there may be a specific type that best suits your property, by far the easiest type of ADU to build is a new construction fully detached ADU. There are a bunch of advantages to keeping the new unit separate from the main house. First, from the perspective of someone living in each unit, having a fully separate dwelling is a nicer experience from a noise and privacy standpoint. There are no shared walls or floors, sound insulation isn’t much of an issue, utilities can be completely separate, and with careful design consideration, each unit can have some private outdoor space to enjoy.

There are also some technical reasons I recommend detached ADUs. Working within the confines of an existing structure can be difficult - especially if you have an older home or aging garage. Building new living units requires that it meets current codes and regulations. When building within an older house, cities often use the new project as an opportunity to make people upgrade the existing home to meet current codes as well. This could mean doing structural upgrades, replacing stairs that don’t meet code, adding egress windows, putting in fire and sound separation, and sometimes even adding residential sprinkler systems to the house. These can be complicated upgrades that add significant cost to the project. Plus, doing a detached ADU give you the most flexibility with the design, to make a space that is both great to live but also meets your style and aesthetic choices.

Examples of ADUs

Discussing the types of ADUs that can be built is one thing. Seeing examples of what these spaces can look and feel like is something else. Below are a range of projects that showcase the various types of accessory dwelling units that are possible. All are designs that I worked on and styles that vary based on the location, the client’s needs, and surrounding context.

Other common names for ADUs

Although ADUs, or accessory dwelling units, are the technical term used to describe these project types, there are many other common names to describe these housing types and the common use of these names vary depending on location.

Backyard cottages, granny flats, laneway houses, casitas, and guest houses are all common terms used for the stand-alone detached ADUs. For garage conversions or apartments built over garages you may hear them called carriage houses or garage apartments. These have been featured in pop-culture, specifically the Fonz lived in an ADU over a garage in Happy Days, and one of the main characters in the Hulu show The Handmaid’s Tale also lived in an apartment over the garage. In the show Full House the family had both a basement ADU and an Attic ADU.

Attached ADUs have been called bump-out ADUs in some places although this isn’t the most common ADU type. On the other hand, basement ADUs are some of the most common ADU projects and have many common names including: basement apartments, au pair units, mother-in-law units, in law units, Pied-à-terre, secondary suites, accessory apartments, to name a handful.

Regardless of what they are called we believe adding an ADU is a great idea and a worthwhile investment. They provide housing, can increase your property value, and can also generate rental income. You could also consider building yourself an ADU to live in while renting out the primary residence to a young family. Or perhaps you want to having aging family members live close by to save on the cost of care or to have grandparents nearby to help with childcare. Regardless of the reason for building an ADU, we think they are great projects that are fun design challenges.

One thing of note, ADUs are not tiny houses. Tiny houses are their own category of dwelling and typically refer to very very small units built on wheels. Unlike tiny houses, Accessory Dwelling Units are built on real foundations and are permanently fixed to their location just like a full sized house.

Typical Uses For ADUs

There are many reasons people consider for adding an ADU. Sometimes it is for increased living area for their family. Often it is to provide housing for an aging family member so they can be close by if they need care. Perhaps the most common reason to build an ADU is as a real estate investment, to generate rental income and increase property values. Building an ADU can be a great investment regardless of the use. As a property owner, you get to leverage an asset you already own - land - to add a new home. This is a low-barrier to entry into small scale real estate development. Accessory Dwelling Units also can be designated as affordable housing. Many cities, like Portland, Oregon, are actually incentivizing people to make ADUs affordable by waiving some of the development fees and also allowing property owners to build additional units if a percentage are designated as affordable. Even without the incentives and designations, adding an ADU creates naturally affordable housing since there are less costs to build an ADU than a new house considering the land is already owned and the size is limited.

We also sell Modern ADU Plans in order to help make these more affordable to a wider range of people.



Frequently Asked Questions about ADUs

Question 1: What is an ADU?

ADU is an acronym that stands for Accessory Dwelling Unit. The term refers to adding secondary homes on a property that already has a primary residential unit. For instance, if you own a single family house and build a second, smaller home in the backyard to rent out, that would be considered an ADU. This second unit could come in many forms including detached new construction ADUs, garage conversion ADUs, attached ADUs, basement conversion ADUs, or other internal ADUs. We find that the most common and ideal option for most properties is to do a detached accessory dwelling unit as they are the least disruptive to those living in the primary house.

Different places have different names for ADUs so you may have heard some of these names: granny flats, in-law units, backyard cottages, guest suites, laneway suites, au pair suite, basement apartment, secondary units,and more.

Regardless of what we call them, ADUs are great ways to add new housing options to our neighborhoods. They are used for a variety of reasons and are excellent investments. We have designed ADUs for aging parents, long term rental income, Airbnb rentals, downsizing, barrier free living, aging-in-place, guest suites, home offices, or just to have extra space for a family.

ADUs are inherently affordable as you don’t have to buy land, and they can provide income streams while increasing your property value. They are really great investments and are growing in popularity across the country.

Question 2: How much does it cost to build an ADU?

This is almost always one of the first questions we get asked, along with how much are the permitting and design fees. Fees can vary widely depending on the specifics of your project, the scope of work, complexities of the site, your budget, style and materials used. Cost also fluctuates with the market, so prices typically rise over time. This being said, below is a rough breakdown of the the typical cost of a detached ADU project in Portland, Oregon. Depending on your location the costs could be more or less than what is shown below. For instance, in the San Francisco Bay Area, New York City, or Seattle, the construction costs would probably be about 25-50% higher. In smaller cities or towns, like those in upstate New York, or the rural towns of Oregon or Washington, the construction costs could be a bit lower.

  • $200,000 to $350,000 - Construction Costs with a General Contractor (a high-end, luxury ADU could easily go much higher than top range. We have seen ADUs for over $500,000)

  • $20,000 to $35,000 - Architectural Fees (typically 10% of construction costs)

  • $3,000 to $5,000 - Structural Engineering Fees (around 1% of construction costs)

  • $7,000 to $25,000 - Permits (The range in cost here varies greatly by the local jurisdiction. In Portland it is largely dependent on two things: 1) Is the ADU being built initially as a short term rental? If not, there is a System Development Charges (SDC) Fee Waiver. 2) Do the additional plumbing fixtures for the ADU necessitate a new water supply branch installation by Portland Water? This alone can add over $6,000 to the cost of permits.)

  • $230,000 to $415,000 - ESTIMATED TOTAL PROJECT COST

As I mentioned, this is just a rough breakdown of the project costs. Location plays a big role in the cost of the project as material prices and labor expenses can vary dramatically across the country. The specifics of your property, construction access to the site, the final design and size, the quality of finish materials, appliances, fixtures and other design elements can impact this cost. With so many variables, please use these numbers as a quick estimate to help you build a project budget and conduct more research on ADUs in your area. If you have any questions or would like to run some costs and assumptions by us, please don’t hesitate to reach out.

Question 3: How long does it take to design and build an Accessory Dwelling Unit?

This is another tough one to answer as every project and client is different and some aspects are far outside anyone’s control - like the permitting process and weather conditions during construction. In my experience it can take anywhere from 12-20 weeks to design an ADU. Permitting varies greatly by jurisdiction, but in Portland we estimate permit approvals take about 10-12 weeks (where in some of the cities in the Bay Area permit review could easily take 6 months or more). Once permits are approved, we estimate 5 to 10 months to build the ADU, depending on weather conditions, material and labor availability and other unforeseen setbacks. In total that comes out to about a year from start to finish on the shorter side and maybe 18 months or so on the longer side. This timeline is for a detached accessory dwelling unit. It could be a bit shorter if you are doing an internal ADU like a basement or garage conversion.

Question 4: What services do you provide for ADU projects?

I view my role as a guide for my clients as we work through the design and construction process. I am there to see the big picture when it comes to your project, and foster the design concept through to the intimate details. This includes interviewing you to understand your goals and ideas, your aesthetic taste, and your specific needs. I then conduct research to understand the site conditions as well as the codes and regulations that will affect the project. I guide you through an iterative design process where I help you explore what appeals to you aesthetically and what you require functionally. I then coordinate the team of design, engineering, and construction professionals as we refine the design, work out the details, obtain permit approval, and turn the drawings into a built project. During construction, my job is to work with you and the general contractor that we select to build the ADU, so that your project is built the way it was intended, and that the final project meets your expectations.

In short, I help you with everything from creating a site plan, developing the architectural concept and floor plans, all the way to selecting tiles, counters, and other finish materials. I follow your project from early concept design through completed construction working with your best interests at heart.

Question 5: When should I involve a designer for my ADU project?

I may be biased, but I don’t think it is ever too early to hire a designer. We can add great value as you consider your options and refine your goals and ideas. If you are looking for a new property to buy, we can help analyze what the opportunities or challenges could be for different options. Designers can provide important pre-design services including site evaluation, feasibility studies, programming, and can help you explore options you may not have considered. Involving a designer early in the process can help avoid costly mistakes, and increase the likelihood of your satisfaction with the project. Plus, the earlier you hire a designer, the more time they have to really learn what your needs and taste is. It is my goal to design something specific to you and your site. Where the building is beautifully integrated into the surrounding context and responds to your unique needs, taste, and lifestyle.

Question 6: Don't designers add substantial cost to an ADU project?

Design fees are an investment that can actually save you money over the course of your project. Designers are focused on your project and help you make decisions that in the best interest of achieving your stated goals. This can include tracking the budget and making design decisions that keeps the project from going beyond what you can afford to build. We are familiar with general costs of materials and systems, and how design decisions could impact construction costs. We monitor your budget and can negotiate with contractors and suppliers to get preferred pricing on materials. At the same time, the design work itself can impact project cost in a beneficial way. With a strong passion for sustainable design my work aims to reduce energy and water use which can save you money over the lifespan of your project. Selecting high quality materials and systems can reduce maintenance costs or allow you to avoid costly replacements down the road. All of these savings could be much greater the upfront design fees.

Beyond just the potential lifecycle cost savings, creative problem solving can turn a difficult property into a successful building site. We can look for opportunities to take advantage of or challenges to avoid. We also spend time documenting and detailing the design decisions to avoid costly changes once construction is underway; one of the biggest reasons projects go over budget is change orders in the field. It is always cheaper to make changes on paper before construction begins.

It is also important to remember that design fees are part of your project budget from the beginning. If you come to us and say your total project budget is $350,000 then that would include all project costs. Design fees wouldn’t necessarily increase your budget beyond that number unless you decide to increase the budget. You are in control of how much you spend and it is our job to help you manage that budget to get the best results.

Question 7: How are designers compensated?

Design fees can be based on time, a lump sum, a percentage of the construction cost, or based on the project's square footage. Each design studio has their own ways of deriving their fees and billing clients. And fees can vary depending on the scope of work, included services, complexity of the project, or even how often clients change their mind or ask for design revisions. Overall, estimating design fees to be approximately 10% of your project cost will be a good starting point when developing your budget.

Having worked with over 60 ADU clients to date has provided some insight into what clients like in terms of fee structure. I have found that clients prefer to have cost certainty as they begin their project. Hiring a designer can be stressful and there are many horror stories of design fees going far above initial estimates and getting out of control. To limit this pain point for clients, I put together a lump sum fee proposal where the fees are fixed from the beginning of work and you know exactly what you will pay for our services. As long as the scope of work doesn’t change or you don’t ask us to start over partway through, our fees won’t change. Typically the lump sum fee will be 10% of the construction budget.

Question 8: What is the client’s role in the ADU design process?

The entire design process is built around our clients and making sure we understand their goals and ideas and design to meet their taste and needs. We depend on you to communicate your design preferences, functional requirements, and budget. This last one is key. It is vital that you are open and transparent about how much you expect to spend on the project. The clearer you are at the beginning the better we can serve you as we work to design inspiring spaces that meet what you are willing and able to spend. We don’t want to design something that is over budget as we want to see our designs get built.

Your timely response to questions and design submissions will help keep the project on schedule. It is also important for you to raise any concerns you have as the project proceeds, so they can be addressed in the earliest stages. Working in partnership with us will help ensure the best possible outcome for your project.

Question 9: How long does it take to permit an ADU in Portland?

We usually estimate that in Portland it takes 10-12 weeks to receive a permit. Although we have heard that some projects are getting approved on faster timelines with the electronic permit submission now in place.

It is important to point out that each jurisdiction is different so permitting times can vary greatly. Some smaller towns or cities approve projects in a few days. Larger cities like those in the Bay Area can take many months to approve a design. We recommend you call your local building department to inquire what their typical timeline is for permit approval. Or if you would like us to help you find this information let us know. We would be happy to help.

Question 10: What is the payback time for an ADU investment?

What do you think you can get for rent? I know it isn’t great to answer a question with another question but that is really the crux of the question. If you are in a high rent area like Berkeley, California you may have a payback period of 5-6 years. If you are in a smaller town with lower rents it could be 10-15 years.

The good news is that ADU actually can pay you back twice. First is the rental income they can generate on a month-to-month basis. If you rent these out as long-term rentals or even Airbnb/short term rentals you can get revenue on a monthly basis. You would just have to check that what you can get in rent would be more than the cost of the servicing the loan you use to build the unit. On top of the rental income, your ADU also adds value to your property. If or when you decide to sell the property you will get an increased return based on the ADU that adds to the value of the main house.

Crunch the numbers to verify this, but we think they are great investments.

Question 11: How are ADUs financed?

The client’s I have worked with primarily use three ways to finance accessory dwelling units: cash, home equity lines of credit (HELOC), or cash out refinances of the main house. Right now there aren’t many financing products specifically for ADUs although as they grow in popularity this is starting to change. Banks are recognizing the value they add and are starting to be more open to financing options for adding ADUs. Many cities are also working on finding ways to create financing products to make ADUs more attainable for people of all income levels. I recommend contacting your local bank or credit union to talk about what financing options they have that would cover the cost of adding an ADU.

Question 12: What is the cost per square foot for ADU projects?

No offence, but this is the wrong question to ask. Construction costs are not proportional like this. An 800sf ADU doesn’t cost $350 more than a 799sf ADU. I know many resources on the internet talk about cost per square foot and some contractors and real estate agents talk about costs this way, but with smaller projects like ADUs it just doesn’t make sense.

Put it this way, all ADUs have some things they have to have: kitchens, bathrooms, heating, water and electricity, a foundation, roof, walls, a front door. These tend to be the more expensive parts of a home. Where a full sized home can distribute the cost of these items over lots of square footage in empty bedrooms or living rooms ADUs don’t have that ability. If you did calculate the cost per square foot of an ADU it would be much higher than the square footage costs you find on other sites.

Quick example, the project image at the top was an ADU that was about 500sf and cost about $200,000 in construction costs. That is around $400/sf. or $500/sf if you include the full project cost. Now lets say we added another bedroom and expanded the living room to make that an 800sf unit. The new cost wouldn’t be 800sf * $500/sf for a total cost of $400,000. Instead it would probably be around $300,000 total, an addition of around $50,000 in construction costs.

Costs just aren’t proportional to square footage so please start thinking about total budget rather than per square footage. If you have a budget of say $300,000 we could design you a nice 400sf unit or a nice 800sf unit. In both situations we would design a project that balances your budget with your goals and needs.

I’m glad we all agree to think about cost differently.

Question 13: Can I buy a pre-designed ADU Plan?

Yes you can. Depending on the local codes and regulations there could be a predesigned ADU that meets your goals and the local rules. In fact, we sell ADU plans of projects that we have designed to offer great modern design to more people. We understand that not everyone can afford or wants to spend the time on a custom ADU design. Buying a predesigned planset may be the right path for you. It could save some money and time. However, each local jurisdiction has their own sets of rules that determine what can be built. It is up to you to make sure that the plans you buy meet the regulations where you live.


If you have any further questions don't hesitate to send us a message. We love talking with people about their ideas and helping them consider their options. We will do our best to get back to you as soon as possible. Thanks.

This modern ADU in Portland had a construction cost of about $200,000. The clients then invested another $25,000 or so for the landscape design and construction. Including the design fees, engineering fees, and permitting cost the total project cost…

This modern ADU in Portland had a construction cost of about $200,000. The clients then invested another $25,000 or so for the landscape design and construction. Including the design fees, engineering fees, and permitting cost the total project cost was approximately $250,000.

How Much Does An ADU Cost?

More and more people are considering having an ADU designed and built for their property, and one of the primary questions they have is how much does an accessory dwelling unit cost to build? People like you want to know how to start budgeting for ADU projects whether they are living on Bainbridge Island outside of Seattle, in Portland, OR, or down in Los Angeles, California. ADU Cost is one of the most common questions we get and we will do our best to outline the areas that impact ADU budgets below.

The problem with googling “ADU Cost”

A quick search on google for cost of construction can lead to a wide range in estimates, and most of them are not realistic, especially for ADUs. Having worked on over 60 ADUs to date we have designed everything from simple 500sf projects on flat lots to larger 1000sf ADUs on tricky sloped sites. We have a good sense of the cost ranges for these projects and what factors impact the final price. We will do our best to outline how to set your budget and then will give a breakdown of ADU costs from a recent project that you can use as starting point to build your budget.

But first, let’s discuss cost per square foot numbers and why you shouldn’t use this is a way to develop a budget for ADU projects.

Many resources on the internet, some contractors, and many clients use cost per square foot as a basis to develop a budget for residential projects. I want to urge you not to use this as a metric to analyze your ADu budget. Although this can work if you have your numbers correct, we find that it can be very misleading for budgeting an accessory dwelling unit compared to a full custom home. The main problem has to do with scale.

Just like a large home, ADUs have all the expensive parts needed to live - a functional kitchen, bathrooms, plumbing and electrical systems, windows, doors, excavation and utility work, plus design costs and permitting fees. On a large home these costs get spread out over the larger square footage and cheaper space to build, like bedrooms and living rooms. A good way to think about it would be that the cheaper rooms like bedrooms and living rooms subsidize the more expensive rooms like kitchens and bathrooms plus utility connections, etc. ADU floor plans don’t have this advantage since they are limited in size.

Not all square footage is the same cost. A bedroom is just empty space with blank walls, a couple of windows perhaps, some flooring, and a couple of doors. This is relatively cheap to build. A kitchen on the other hand has all the walls and floor, but more lighting, appliances, counters, cabinets, plumbing work, more complicated electrical, etc. It is much more expensive to build. Where a bedroom may be $150/sf a Kitchen is more like $400 or $500/sf. This means that going from a 700sf to an 800sf project can actually bring your cost per square foot down considering both have a kitchen and a bathroom. The 800sf ADU spreads those costs out over an additional 100sf.

With ADUs being so small, they don’t have the extra square footage to spread the base costs out like a larger home does. A $200,000 five hundred square foot ADU would have a cost per square foot of $400. Where a $600,000 two thousand square foot home would only be $300/sf.

The point here is that we encourage people to develop a budget and then work to design something to hit that total project number. The size of the unit is less of an impact on final cost than the form, site conditions, materials, and systems selected. Start your project knowing that the base cost of building an ADU will be about $200,000 and then the decisions you make with your design team will impact what the final cost ends up being. Our advice is usually that ADUs come in between $200,000 on the low end and $500,000 on the upper end. We have seen some luxury ADUs in the Bay Area and Los Angeles even exceed $500,000.

 

How Much Should You Budget For Your ADU Project?

ADUs have three main costs to build into your budget: design fees, permitting fees, and construction costs.

ADU Design Cost

For a custom designed ADU you can expect that the design cost will be between 10-20% of your total project costs. These would include the cost of an architect or designer, structural engineer, surveyor, and other consultants that may be needed. Although most people decide they want a custom designed ADU that is specific to their needs, aesthetic taste, and responds to the unique character of their property, it is possible to save on the design cost by starting with a pre-designed ADU plan set. If you are trying to bootstrap a project and reduce costs as much as possible this could be a good way to go. We sell ADU floor plans of our past projects for those looking to save time and money. Shop for a floor plan design that works for you here: Modern ADU Floor Plans

ADU Permitting Cost

Permitting fees can vary greatly from city to city, but in Portland, Oregon you can expect that the permit fees for a detached ADU would be between $6,000 and $14,000, potentially more if you are going to use the ADU as a short term rental like Airbnb or VRBO. The big range here has to do with water service and whether you will have to upgrade the water meter for the property and/or add a new water meter for the accessory dwelling unit. If you are able to simply tie in to the existing water and sewer service of the main house you would fall on the lower end of the range. However, you may want to chose to install a new water meter if you will be using the ADU for rental income, so you can pass on the water utility bill to the tenants.

ADU Construction Cost

Construction cost is the big variable and depends on the site conditions, project size, design complexity, and the selection of materials and systems. We find that with today’s construction costs building an ADU, even smaller simpler projects on flat sites, will come in at $200,000 or more. That is sort of the baseline price, and the cost can go up from there depending on some of the variables mentioned above. Building an ADU can be complicated and we don’t advise taking shortcuts to save cost.

Although $200,000 is achievable for a nice but simple ADU, in our experience, most clients decide to add features that drives the cost up from that baseline. Whether it is nicer windows, higher performing systems, nicer interior finishes, high-end appliances, or premium materials, there is almost always a decision that is made where the clients balance the quality vs price and decide to upgrade the design. For this reason, we say that the average price of an ADU is about $250,000 in the Portland market. In places like the Bay Area or Seattle the average cost for an ADU is closer to $350,000 or more. On the higher end of the scale, if you are looking for a premium luxury ADU with the top of the line systems and appliances, high-end materials, and a premium design, you can look to spend $400,000 to $500,000 or even more.

Keep in mind that these construction cost estimates are for the construction only. On top of the construction costs needed to build the ADU, there would be the 10-15% in design fees and $6,000 to $14,000 in permitting fees. When you build your budget and talk to your design team about the project costs, make sure to be clear what the costs of construction are and what the total project costs are. $200,000 in construction costs probably means a total ADU project budget of closer to $240,000.

Interior view of a studio ADU on the second floor with a home office below.

Interior view of a studio ADU on the second floor with a home office below.

 
This project current being designed is on a sloped site which requires additional concrete foundation work.

This project current being designed is on a sloped site which requires additional concrete foundation work.

 

Accessory Dwelling Unit (ADU) Construction Cost Breakdown:

To give you a sense of how the construction budget gets to those ranges, below we have broken down a budget for a 790 square foot ADU we designed in the Cully Neighborhood in NE Portland. This ADU is being used to generate rental income and the couple who built it plan to move into the ADU when their kids leave the house. It was designed for aging-in-place with all necessary living functions on a single level.

Below is a rough construction cost breakdown for a 790 square foot sustainable ADU that was built in the summer of 2015 in Portland, OR (we’ve inflated pricing below to reflect an average 6% construction cost increase per year since that time). This design has a few unique elements that are reflected in the cost breakdown. The design includes a high performance envelope - typical wall construction with standard batt insulation walls & roof per code, plus an additional 2” of continuous exterior insulation on all the walls, and an additional 3” of continuous exterior insulation added to the roof, plus a fully insulated slab. We also designed it to have radiant floor heating with an on-demand hot water system. There was also a couple of unique custom windows that are significantly more than standard windows would be - however they were important to the design and function of the spaces.  

Finally, this breakdown is for the construction costs and doesn't include Architectural or Structural Design Fees. The design fees vary depending on the complexity and size of your project. We recommend budgeting about 10-15% on top of the construction cost for design fees, $6-14k for permitting, and we always recommend budgeting another 10% as a contingency fund to cover any unexpected costs that may come up.

Permits: $12,000
This includes the current Portland SDC Waiver. Typically permitting fees for an ADU fall around $6-$14k. This project came in at the higher end due to the fact we had to upgrade the water supply line & meter size due to the amount of plumbing fixtures in the main house and ADU combined.

Excavation: $15,000
Around a 650sf slab area including the exterior decks. Also included excavation for a couple landscaping retaining walls on the property.

Concrete Work: Footings & Retaining Walls: $28,000
This includes work needed for the ADU plus a couple of retaining walls that were designed as part of the surrounding landscaping.

Concrete Slab: $8,000
The interior exposed concrete slab and finishing for the floor of the main level. This was poured as a separate slab from the foundation footings.

Framing and Sheathing: $25,000
Typical 2x6 stud wall construction, 2x12 roof joists, supporting structural posts and beams. The large exposed glulam beam in the center of the project was around 30’ long to span the length of the living space.

Siding: $12,000
Horizontal fiber cement siding with vertical tongue & groove cedar siding at the front entry and back patio, as well as a cedar soffit under the eaves.

Roofing: $15,000
Standing seam metal roof

Windows and Doors: $15,000
2 custom windows (including a complex window that wraps the corner of the kitchen), 3 skylights, 8’ front door with sidelite, 8’ two panel sliding door, and three large vinyl sliding windows.

Plumbing: $25,000
Includes radiant floor heating installation and an on demand hot water system. Plumbing fixtures, sump pump, fire protection sprinklers & installation.

Electrical & Fixtures: $20,000
Electrical panel, electrical wiring, outlets and switches, lighting fixtures, and installation labor.

Insulation: $12,000
Roxul batt insulation in walls and ceiling stud cavities per code, plus an additional 2” of continuous exterior polyiso insulation on all walls, 3” of continuous exterior polyiso insulation added to the roof, and a fully insulated slab on grade. (This amount of insulation is well above code requirements and is close to passive house standards. With some solar panels this ADU could easily achieve net zero energy. )

Sheetrock (Drywall): $10,000
Drywall, mudding, taping, sanding

Interior Doors: $2,500
2 standard doors, 1 pocket door and 3 closet bi-folding doors

Paint - Exterior: $5,500
One color, no accent or trim color

Paint - Interior: $8,000
One color throughout the interior.

Trim Work: $5,500
1x4 painted MDF base trim, plus clear coated fir window sills

Cabinets: $6,500
IKEA kitchen cabinets and some custom casework in laundry and bathroom

Countertops: $1,500
Ikea wood countertops material and install labor

Tile: $7,000
Kitchen backsplash and shower - materials and labor

Staircase: $3,500
Off the shelf spiral staircase kit

Flooring in Loft: $3,500
Pre-finished solid White Oak, about $8/sf plus misc. materials and install labor

Cable Railing: $3,500
Off the shelf system

Appliances: $7,000
Stovetop, oven, vent hood, dishwasher, garbage disposal, refrigerator, washer, and dryer

TOTAL: $251,000
Includes all materials, labor and contractor fees.

The budget above is fairly typical for ADUs we have worked on over the years. And it is important to point out that this wasn’t a high-end or luxurious project. There were a few places where the clients made decisions to invest more to get the result they were looking for. For instance we had some custom windows, skylights, and radiant floor heating. The rigid insulation was also an upfront cost but will pay itself back through lower energy bills for the lifetime of the project. Meanwhile, the rest of the project was pretty standard materials and systems and in some places we used cheaper than normal elements, like the Ikea kitchen. Overall, we think this is a good starting point for most people who want a high-quality, nicely designed accessory dwelling unit in Portland, Oregon.

Important Note:
Every site is different and the conditions can greatly impact cost. Excavation and concrete work costs can vary greatly depending on the topography and of the site and other conditions (is it sloped? lots of trees? poor soil conditions? Does it need extra soil removal or backfill?). Ease of access to the location of the ADU can also add costs (are there fences that need to be removed and rebuilt? Can machinery get to the location to excavate or deliver materials? will a crane rental be required?). Material selections and other design decisions you and your designer will make throughout the process will also have a big impact on cost. The outline above is a good starting out point but I guarantee your project will end up being different.

If you have any questions don't hesitate to reach out. We are always happy to talk about the unique aspects of your project and talk through your goals and ideas for a sustainable Accessory Dwelling Unit.

This ADU in the Cully Neighborhood of Portland would cost about $250,000 to build.

This ADU in the Cully Neighborhood of Portland would cost about $250,000 to build.

 
Interior view of the ADU’s main living space with an open loft above. A 30’ long glulam beam spans the length of the living room.

Interior view of the ADU’s main living space with an open loft above. A 30’ long glulam beam spans the length of the living room.

 
A large custom window wraps the corner kitchen, offering great views to the surrounding yard.

A large custom window wraps the corner kitchen, offering great views to the surrounding yard.

What Is An ADU And Why Should You Build One On Your Portland Property?

Accessory Dwelling Units, ADUs for short, refer to a second home on a property that already has a main house. Typically these are smaller than the main home and are detached structures located in the backyard. However, they can also be internal ADUs adding an apartment within the main structure. For instance, you could convert a basement into a separate apartment or renovate an attached garage into a new living unit.

Most often ADUs are built by homeowners who want to add a unit to their property to earn rental income, use as a guesthouse, or for a relative to live. People also build these for themselves in order to downsize and allow them to rent out the larger main home. With the growing popularity of ADUs around Portland and across the country, many new houses are being built with ADUs as part of the development. We see many new homes include basement ADUs as part of the selling point for new homeowners.

Portland has grown into one of the most popular markets for Accessory Dwelling Units. With recent changes in state and local laws, ADUs are now permitted on any residential property. And the city of Portland has seen applications for accessory dwelling units skyrocket over the past few years. We foresee this trend growing further as housing prices increase and limitations loosen even further. In the summer of 2021 Portland will allow multiple ADUs per property which should contribute to even more of these housing types being built.

ADUs are a great way to increase the value of your property and earn additional income by renting one out. The extra revenue can help you pay off your mortgage faster, afford a larger house or a home in a more desirable area, or just give you extra money to live more comfortably or take a nicer vacation.

As well as being a great investment for most homeowners, ADUs also are great assets for our communities. Housing costs continue to rise, often outpacing increases in income. More an more people are searching for housing opportunities that are affordable and are in desireable urban neighborhoods. Accessory Dwelling Units are a great way to address these issues. They add new housing while maintaining neighborhood character. They increase density while being sensitive to the surroundings, and the new residents also contribute to the local economy, boosting small businesses. And with the additional residents, cities get additional revenue to provide services like better public transit. They really are a win-win for everyone.

To summarize, Accessory Dwelling Units can provide rental income, an increase in property values, housing for family members, and on a neighborhood scale they create desirable growth without needing to add new infrastructure, while providing affordable homes. The new residents also will benefit the local cafes, restaurants, and shops - a boon to local businesses.

I have led the design effort on over 60 ADUs to date, with a focus on developing beautiful solutions for these project types while incorporating sustainable design strategies. I’ve developed an expertise in these projects because I believe in their ability to positively impact our communities.

Thousands of Portland residents have already added an ADU to their property, to take advantage of some of the benefits described above. I anticipate that this trend will continue to grow considering that Portland will soon allow multiple ADUs per property. It makes sense that many people who already have detached ADUs in their backyard will now consider adding another in their basement, or housing developers may create new developments with basement units and detached ADUs as a new product as the market starts demanding homes that have built-in revenue streams.

I am excited to see how this market shifts and grows over the coming years. My goal is to help guide people through the process of adding ADUs to their properties - creating beautiful and sustainable designs that are environmentally, socially, and economically responsible investments.

If you are interested in learning more about accessory dwelling units, or have questions about an ADU project you are considering, please don’t hesitate to reach out. We are always willing to discuss your goals and ideas and offer advice or design services to help you achieve your vision.

The Namaste ADU in SE Portland was designed as a modern home that opens to a Japanese inspired garden.

The Namaste ADU in SE Portland was designed as a modern home that opens to a Japanese inspired garden.

 
This ADU in NE Portland is a 2-bedroom apartment perched over a 2-car garage. The design aimed for a balance between the traditional craftsman style homes in the neighborhood with a contemporary feel.

This ADU in NE Portland is a 2-bedroom apartment perched over a 2-car garage. The design aimed for a balance between the traditional craftsman style homes in the neighborhood with a contemporary feel.

 
A compact layout allows the ADU to be tucked back into the landscape, preserving private outdoor spaces for both the main house and accessory dwelling unit.

A compact layout allows the ADU to be tucked back into the landscape, preserving private outdoor spaces for both the main house and accessory dwelling unit.


You can learn more about Portland ADUs and the Permitting Process here:
https://www.portland.gov/bds/adu-permits


 

ADUs have different names depending on where you live. We have also hear the following names used interchangeably:

Alley Apartments, Detached Accessory Dwelling Unit, DADU, Accessory Apartment, Accessory Suite, Ancillary Unit, Backyard Cottages, Basement Apartments, Carriage Houses, Garden Cottages, Garden Suites, Granny Cottages, Granny Flats, Granny Pads, Granny Units, Guest Suites, Home within a Home, In-Law Suite, In-Law Unit, JADUs, Junior Accessory Dwelling Units, Laneway Houses, Laneway Suites, Mother-In-Law Flats, Multigenerational Homes, Next Gen Units. SDUs, Secondary Dwelling Units, Secondary Suites, HGTV has popularized Tiny Houses although that often means small homes on wheels which aren’t really what ADUs are. In Hawaii they have Ohana Units (and by the way, we would LOVE to do a project in Hawaii).

Why Everyone Should Consider Building an ADU

A modern Detached ADU in Portland, OR designed by Lucas Gray

A modern Detached ADU in Portland, OR designed by Lucas Gray

Across America, cities and towns are facing rapidly rising housing prices that outpace increases in salaries. This is causing a housing crisis where the average person can't afford to own a home and sometimes can't even find affordable rental units. This is a huge issue here in Portland, Oregon and the government and many passionate citizens are trying to develop solutions. Sometimes this comes in the form of publicly subsidized affordable housing, yet there is also a movement to address this through market rate solutions in the form of Accessory Dwelling Units or ADUs.

ADUs, sometimes called laneway housing, granny flats, DADUs, backyard cottages, and many other terms, is a small secondary house built on the property of a typical single family house. Although each jurisdiction that allows these housing types has different rules and regulations, for the most part they all lead to the same end result - more housing options in our neighborhoods while preserving neighborhood character. They add density in a sensitive way while giving homeowners the potential for rental income, and renters an affordable housing type in neighborhoods throughout the city.

There are three primary uses for ADUs. Many people build them to downsize their life. Perhaps their kids have left the house and they no longer need as much space. Adding an ADU in the backyard can be a great way to downsize your living space while renting out the main house to a new family to grow in. Another common use is for aging family members. Often ADUs are built for barrier free living and Accessibility for aging-in-place or multi-generations living together on a shared property. The third primary use is as a rental unit, either long-term rental or short-term (think Airbnb). For this last use, the benefit is that the ADU can provide additional income and help cover mortgage payments. This can help people afford to stay in their homes as costs increase, or allow young families to be able to afford buying a home in the first place.

ADUs are not allowed in all jurisdictions although they are growing in popularity and most cities and towns are considering ways to allow them within their codes and regulations. In Portland, ADUs are limited to 800sf in size and 20' in height. The goal being to keep the accessory dwelling a bit smaller than the main house. This still is enough space to have a very nice 1 to 2 bedroom unit. Within this size limitation, there are endless options and creative design solutions to make these projects wonderful places to live.

I have worked on more than 50 ADU projects over the past 8 years and have become an expert in designing creative small scale housing that still becomes a great place to call home. I love this project type because it addresses so many of the issues facing our cities - ADUs increase density, they are small and efficient homes and are inherently sustainable, they provide supplemental income to homeowners often preventing displacement and allowing people to stay in their neighborhoods, and they are fast paced design projects that allow for creativity and experimentation.

A full sized kitchen with custom cabinetry fits nicely into this 700sf ADU.

A full sized kitchen with custom cabinetry fits nicely into this 700sf ADU.

Working with people of all backgrounds that are interested in ADUs is one of my passions. I love education people about the opportunities and challenges of these project types and answering questions about cost of construction, how long it takes to design and build an ADU, and design regulations that affect these projects. Please feel free to reach out if you are considering one of these projects on your property. I’d love to help.

Although ADUs are small projects, they are still complicated and need a close attention to detail to make them successful. This is another reason why reaching out to an experienced design team is important to achieve a great ADU. Fitting all the parts of a full house in an 800sf size is challenging and needs some creative space planning. I have many examples of ADU designs, floor plans, and other resources that can help inform your thoughts as you consider adding an ADU to your property. Using my breadth of experience I can help make your project be successful while balancing beautiful designs with functional layouts that meet the project budget.

A spacious ADU bathroom with no threshold shower designed for barrier free living and aging in place.

A spacious ADU bathroom with no threshold shower designed for barrier free living and aging in place.

ADUs can come in a variety of styles to fit your needs, taste, and the context in which they are built. Some places have restrictions on what they can look like, but for the most part ADU designs can be traditional, modern, or any aesthetic that you would like. The options are endless and they can be custom designed to address your unique lifestyle and tastes. If you are considering an ADU, I am available to help guide you through the design, permitting and construction process.