Work With One Of The Most Trusted And Innovative ADU Builders In The Bay Area
Your Trusted Partner For Affordable And High-Quality ADU Building Solutions In California
We’re the ADU Builders Bay area communities love to work with.
Are you a homeowner or investor in the San Francisco Bay area looking to add an ADU to your property? Whether you’re looking for a rental unit, a place for family members to stay, or simply extra space for yourself, we can help. Our team of experienced builders and designers will work with you to create the perfect ADU for your needs and budget
We're the ADU Builders Bay area communities love to work with.
And We’re Out to Create A Living Space That Will Make You Proud.
It doesn’t matter if you’re in San Jose, Oakland, or San Francisco, we’d love to help you build an ADU in the Bay area!

We’re passionate about building ADUs and love what it does for families and individuals across the Bay area and beyond. We believe that ADUs can help solve the current housing crisis and we’re more than committed to being a part of that solution.
What is an Accessory Dwelling Unit (ADU)?



An accessory dwelling unit is a secondary unit to an existing home that people use as backyard homes, guest rooms, storage spaces, rental properties, and so on.
They can either be attached to a primary residence or added to a backyard. In some cases, you can also have a basement or garage conversion, adding more space to your property.
Most commonly, an accessory dwelling unit serves as a residential building. However, they can also be used for other reasons, including guest housing, rental properties, offices, studios, storage rooms, and so on.
An accessory dwelling unit is a secondary unit to an existing home that people use as backyard homes, guest rooms, storage spaces, rental properties, and so on.
They can either be attached to a primary residence or added to a backyard. In some cases, you can also have a basement or garage conversion, adding more space to your property.
Most commonly, an accessory dwelling unit serves as a residential building. However, they can also be used for other reasons, including guest housing, rental properties, offices, studios, storage rooms, and so on.



Building an ADU in the Bar area is a stellar idea for all sorts of reasons. Here are just some of the multitudes an ADU brings.
- ADUs raise your property value
- Expand your property’s living space
- They declutter your main house
- They're more affordable than primary homes
- Give your growing family enough space to live comfortably
- Provide more housing to the people in the region
- Encourage multi-generational living and keep loved ones close
- Reduce housing costs
- Practice sustainable living
- Have more space for all your stuff




Wondering what you can do with your own ADU? Here are some of the common use-cases for ADUs.
- Accommodate aging parents or other family members
- Rent out your ADU long-term
- Turn it into an AirBnb for extra income
- Turn your unit into a guest house
- Create a detached office space
- Use it for storage
- Create a caretaker's quarters
- Turn it into a music studio
- House adult children who are job hunting or are in between careers
- Live in it while you're doing a house remodelling project on your primary residence
- Create a backyard cottage



About ADU.Works
Many of us live in accessory dwelling units ourselves. That’s how much we believe in ADUs. But as we looked around, we found that many ADUs on the market were too pricey or didn’t have the features we wanted.
Plus, the building process and customer service weren’t as good as they should be.
Construction times were longer than expected.
Customers had to obtain permits themselves.
We wanted to improve things, so we put together an ADU builder team with lots of experience in construction, project management, design, surveying, restoration, and engineering top create the most beautiful and affordable ADUs in the Bay Area and the rest of the state of California.
You may see a lot of prefab ADU builders out there… We are not one of them. We use the best technology possible to come up with quality PRE-ENGINEERED ADUs that have beautiful interior finishes and cost-effective designs.
Our Guarantee to You
As an ADU builder out to provide the best ADU services, we commit to help you:



Build an ADU in the Bay area that will be beautiful and cost-effective



Provide only the best client service



Use only reliable and quality materials



Adhere to sustainable practices



Use our expertise to build ADUs that maximize your property space



Find the most cost-effective plan possible
What Makes Us and Our Units Different



We don’t like to brag, except when we’re talking about our amazing team. We truly believe we have the best ADU builders in the Bay area. We know what it takes to make reliable and beautiful ADUs for our clients.
Everyone from the project manager to the structural engineers behind your new ADU will provide our best work that we can provide to Bay area residents and homeowners.
Our ADUs are designed to blend seamlessly with your existing property and are built to the highest standards of quality and energy efficiency. We use only the quality materials and construction techniques, so you can be sure your ADU will stand the test of time.
Check Out Our ADU Models
Our ADU Building Process
01 Initial Consultation
During the Discovery Call, we will get to know you and your ADU needs. Our ADU Specialist will provide you with an overview of our models and processes and schedule a showroom visit to discuss the next steps.
02 Site Assessment
Our team will conduct a site assessment to determine the feasibility and placement options for your ADU, including evaluating site-specific costs. We will also research your property’s jurisdiction and permit requirements and include this information in the feasibility report. This report will also provide an estimate of the total cost of the ADU on your property.
03 Feasibility Report & Estimated Cost
After the site assessment, we’ll create a feasibility report to guide the following of the build process. The report will provide an estimated additional cost based on our base cost of the unit and include a layout of the proposed ADU, along with an estimate of any site-specific work needed to complete the project. Additionally, the report will be used to prepare the engineering of your ADU.
04 Build Agreement
Once you’ve decided to move forward, we will provide you with a Build Agreement that outlines the entire process from pre-development and engineering to the delivery of your ADU. This will include specific site-specific costs, the estimated timeline to complete the project, fee schedules, permit requirements, and the estimated cost of your ADU.



Types of ADU Buildings for the San Francisco Bay Area
So what kind of ADUs can your ADU builder create for you? Here are a few of the most common.
Build ADUs that stand completely on their own. A detached ADU can be a backyard ADU or any other structure where the living space doesn’t share a wall or roof with the primary home.
Build ADUs that stand completely on their own. A detached ADU can be a backyard ADU or any other structure where the living space doesn’t share a wall or roof with the primary home.
Build ADUs that stand completely on their own. A detached ADU can be a backyard ADU or any other structure where the living space doesn’t share a wall or roof with the primary home.
Detached ADU
Build ADUs that stand completely on their own. A detached ADU can be a backyard ADU or any other structure where the living space doesn’t share a wall or roof with the primary home.
Garage Conversion
Turn an existing garage into a beautiful attached garage conversion ADU. Garage conversions are a great way to maximize unused garages.
Attached ADU
Build attached ADUs to expand your current living space. An attached ADU will share at least one wall and a roof with your primary house.
Basement Conversion
Do you have an unused or underutilized basement in your house? Turn that into a living space you can house family members in or rent for extra income.



Places in California We Serve
- San Francisco
- San Jose
- Oakland
- Marin
- East Bay
- Hayward
- Silicon Valley
- And More
Are You Ready to Expand Your Living Space with a Beautiful ADU?
Talk to us today and we’d love to help you get your ADU construction well underway!