ADU Builders in Oakland, CA
Navigate planning, design, and construction with a team that executes Oakland accessory dwelling unit projects from concept to completion.
4.9/5 rating from 56+ online reviews.

Your Go-to ADU Builders in Oakland
Building an ADU in Oakland isn’t simply about adding another structure to your property. It’s about understanding site constraints, neighborhood character, local regulations, and how to create a space that genuinely improves the way a property functions.
As experienced ADU builders in Oakland, Sidex helps simplify what can otherwise feel like an overwhelming process. From working alongside our ADU architects in Oakland to navigating Oakland’s ADU requirements, permits, and construction, we deliver tailored solutions that fit your vision. Whether you’re exploring a detached build, a garage to ADU conversion, or a modern prefab ADU, we’ve got you covered.
ADU Solutions for Oakland Properties

Detached ADUs

Attached ADUs

Granny Flats

Backyard Cottages

In-Law Suites

Garage Conversions

Prefab ADUs
ADU Solutions for Oakland Properties

Detached ADUs

Attached ADUs

Granny Flats

Backyard Cottages

In-Law Suites

Garage Conversions

Prefab ADUs
ADU Solutions for Oakland Properties

In-Law
Suites

Garage Conversions

Prefab ADUs
Recent Construction & Site Transformations in Oakland
Expert ADU construction is built on the same structural excellence that drives every Sidex project. Our gallery showcases outdoor construction work, reflecting craftsmanship, planning, and precision that we bring to every ADU project in Oakland and the Bay Area.
EXCELLENT
Based on 38 reviews
Posted on Google![]()
Tatyana PTrustindex verifies that the original source of the review is Google.
Posted on Google![]()
Vivi BabenkoTrustindex verifies that the original source of the review is Google.
My grandparents backyard deck had taken a beating over the years, especially from all the snow and rough weather. It was definitely time for some love, and Sidex really came through for! What stood out most was the crew and how they treated my grandparents like family and were genuinely so kind throughout the whole project. Really glad we chose them!Posted on Google![]()
Sara YarmolyukTrustindex verifies that the original source of the review is Google.
Extremely helpful employees and truly have honest work and craftsmanship.Posted on Google![]()
Valya StepanovTrustindex verifies that the original source of the review is Google.
I can’t say enough good things about Sidex Siding & Decking! From the first phone call to the final walkthrough, the entire experience was outstanding. The team was professional, punctual, and incredibly knowledgeable. They took the time to answer all of my questions, communicated clearly throughout the project, and paid close attention to every detail. The quality of their workmanship exceeded my expectations, and the finished deck looks absolutely amazing. They treated my home with respect, kept the work area clean, and completed everything on schedule. It’s rare to find a company that truly delivers on its promises, but Sidex Siding & Decking did exactly that. If you’re looking for a trustworthy, skilled, and reliable contractor, I highly recommend them. I couldn’t be happier with the results and will definitely use them again for future projects. Five stars all the way!Posted on Google![]()
Max GatsmanyukTrustindex verifies that the original source of the review is Google.
Fast and professionalPosted on Google![]()
Vince CartersonTrustindex verifies that the original source of the review is Google.
Andrey and Nate were very helpful, would work with Sidex again. I am glad everything went as smooth as they said it would.Posted on Google![]()
Sava VashchukTrustindex verifies that the original source of the review is Google.
We recently hired SIDEX to completely replace the old, worn-out siding on our home and we could not be happier with the results. They gave us a highly competitive and transparent quote with no hidden fees.Posted on Google![]()
Rita SnizhkoTrustindex verifies that the original source of the review is Google.
We couldn’t be happier with how our new deck turned out! From the very beginning, the whole process was so easy, and the Sidex Construction team was amazing to work with. They really listened to what we wanted and brought our vision to life exactly how we imagined it! Our outdoor space has completely transformed, and it’s now one of our favorite places to relax. It’s exactly what we had in mind for our home, and we honestly couldn’t have asked for a better result. We highly recommend Sidex Construction to anyone looking for quality work!Posted on Google![]()
Amanda KilgoreTrustindex verifies that the original source of the review is Google.
Had a great experience working with Sidex. Nate was super helpful during the in-person site visit and took the time to explain everything clearly without making us feel rushed or pressured. Andrey was also very helpful with scheduling and keeping everything organized throughout the process. The whole team was professional, easy to work with, and communication was solid from start to finish. Really appreciated how smooth everything went. Would definitely recommend Sidex to anyone looking for quality work and good customer service.Posted on Google![]()
Marjorie SiemsenTrustindex verifies that the original source of the review is Google.
Tim did a wonderful job fixing a leak on my skylight windows. Totally professional and very detailed in his work. I would definitely consider him for future work!
FAQs Regarding ADU Construction in Oakland
What is an ADU?
An ADU, or an accessory dwelling unit is a secondary residential structure located on the same lot as a primary home.
Do you help with ADU permits in Oakland?
Yes. We help homeowners navigate Oakland’s ADU permit process, including planning, approvals, and construction requirements.
What are Oakland’s ADU rules?
Oakland’s ADU rules vary depending on lot size, zoning, setbacks, and project type. Our team helps ensure your project aligns with current local regulations.
How much does an ADU cost in Oakland?
The final cost for an ADU in Oakland depends on design complexity, site conditions, size, and construction type. We provide project-specific estimates during consultation.
How much is an Oakland ADU permit cost?
Oakland’s ADU permit cost varies based on project scope and municipal requirements. We help homeowners understand expected permitting expenses early in the process.
What types of ADUs do you build?
We design and construct detached ADUs, attached ADUs, garage conversions, backyard cottages, granny flats, and prefab solutions for homeowners seeking an ADU in Oakland.




