Accessory Dwelling Unit Contractors
Accessory dwelling units (ADUs) in the Bay Area of California are changing the way homeowners think about primary residence and property value.
Get My Free Estimate
Featured Client Reviews
EXCELLENT Based on 40 reviews Posted on Google Susheel BrahmeTrustindex verifies that the original source of the review is Google. Red white and blue construction was a solid trusted contractor for us. They were straightforward and fair from the beginning till the end. Josh, the owner and his team are driven by on-time of the job completion and take responsibility of their work. The framing specialists were able tackle any on the job changes professionally. Tiling, plumbing and detailing work was done with patience and focus on functionality and long term reliability. Ricardo is a very personable project manager and was able to accommodate our schedules and timings. I recommend RWB for anyone who would want to take on a sizeable project that needs the expertise and knowledge with adherence to the scope and being in budget.Posted on Google Ron BruckertTrustindex verifies that the original source of the review is Google. After contacting at least seven different companies to remodel our home, Red, White, and Blue was the obvious choice. Albert and the team assisted with the design of the space and offered cost-effective suggestions. Luis and the crew were punctual, respectful, and kept the workspace clean throughout the process. Furthermore, we are pleased that the project was finished on time and remained within our budget. We could not be happier with the excellent results!Posted on Google Sonia MahirTrustindex verifies that the original source of the review is Google. We hired Red White and Blue Construction in Berkeley for a complete kitchen remodel that involved removing two structural walls, adding a shear wall, and reworking the layout. The finished kitchen looks great and feels open and comfortable. They offered fair pricing on every change request we made and found smart, creative solutions for the tricky parts of the project. The craftsmanship and attention to detail show in the final result. We’re very pleased with how everything came together.Posted on Google Diane ZylkaTrustindex verifies that the original source of the review is Google. The budget went from an initial $90,000 to $250,000. Red walked off the job. We had to pay another company to tear down and reconstruct our timber tech fence. Additionally parts of the build were left unpainted and three gates had to be replained and rehung as they would not close.Posted on Google Jessie HernandezTrustindex verifies that the original source of the review is Google. We recently remodeled our bathroom and could not be happier. Josh and his team handled everything—plumbing, electrical, tiling, and installation—and the finished space is beautiful. One of the best parts of working with this company was having an in-house designer. Jocelyn guided us through showrooms, helped us stay on budget, and made design choices so much easier. The crew was professional and reliable throughout the entire process. We highly recommend them to anyone considering a remodel!Posted on Google Brendan FolieTrustindex verifies that the original source of the review is Google. When we bought our house, it had unrealized potential. It was functional (except for the shower that would leak water into the room below), but less than ideal -- the low ceilings in the kitchen felt cramped, the laundry obstructed the path to the backyard, which was mostly concrete slab so not inviting anyway, and the cabinets/kitchen floor/bathroom tile were from the 1960's and showing their age. Josh and his team made the house sparkle. Walls and doors were moved, ceilings were raised, foundation was reinforced, floors were leveled. For the affected rooms, everything is new aside from some original framing. It looks fantastic and feels much larger despite occupying the same footprint. What I like about working with Josh is that he has good design sense and he is unruffled. If something doesn't look right, he'll redo it. If a part is delayed, they'll adapt the schedule. We asked for some small changes and he accommodated without asking for a change order. The biggest disaster was about the kitchen sink window -- it was installed out of position and we didn't realize until cabinet installation (the official plans didn't specify the position so the team put it in the middle of the wall, but the cabinet plans required it to be 8" off center). Josh just said "we'll fix it" and they did, though it took a week. I hope to never do something like this ever again, but if I did I'd hire Josh.Posted on Google mike broadTrustindex verifies that the original source of the review is Google. I had a full kitchen remodel… No structural walls were removed. However, the entire kitchen was gutted. (it was over 30 years old)… Red white and blue did a spectacular job… They had a project manager following every step of the way, and the workers used were talented, competent, and worked every day… My remodel was done in five weeks… I couldn’t speak more highly for red, white and blue…thank youPosted on Google Yolanda ValdiviaTrustindex verifies that the original source of the review is Google. Josh and his team did a good job in constructing a new bathroom, pantry/laundry room. I highly recommend their work.Posted on Google supreme patadiaTrustindex verifies that the original source of the review is Google. After talking to the couple of contractors, I am happy to say that I made the right choice with RWB Construction. Josh and his crew were tasked with remodeling my entire home and adding a master suite. The crew was great to work with and found creative solutions to any issues that we discovered along the way. They were respectful and attentive to my requirements. My project was completed on time, in fact a bit earlier than i anticipated. His foreman Alfredo and his crew even worked weekends and late nights when required. I am very happy with the final results and RWB construction was able to finish the project reasonably close to my budget. Highly recommend RWB Construction, great quality, timely and in budget!Posted on Google john sTrustindex verifies that the original source of the review is Google. This was a removal and replace of all bathroom tile in a 4th floor 1BR condo in uptown Oakland. Included bathroom floor, shower pan and walls. It's a large shower with the footprint of the former bathtub. The guys did a great job and accommodated things that were important to me, including coming up with creative ways to work around and preserve the existing custom vanity. From what i understand, RWB does some pretty big jobs, and mine was small, but i i always felt like i was getting the attention that the owner of a mansion in the hills would get. Project Manager Albert and site supervisor Luis were a pleasure to work with - professional, respectful. The workers too. Luis even took care of the downstairs neighbor's concerns about tile debris flowing down through the floor (due to the way the building was constructed each unit is literally connected). As another reviewer commented, remodeling is a pain, especially in a 1 bathroom unit. Luis and the guys tried to at least minimize trhe time period when the toilet was "offline." RWB handled all of the permitting follow ups with the City, which was a load off of my plate. Their bid was a bit lower than another one i obtained. I highly recommend RWB. I was influenced by the high ratings on Google and YELP, and those ratings are real.
EXCELLENT Based on 40 reviews Posted on Yelp Tal B.Verified I had a great experience working with Josh from Red White & Blue Construction to put in a gorgeous shower, build a staircase to connect two levels, and help me turn my storage into usable space. Josh and his team were reliable, punctual, and extremely easy to communicate with throughout the entire project. They sent updates via email and text, and explained all the nuanced details in an easy to understand way. What stood out most was their ability to problem-solve and find solutions when challenges came up, especially when working with the city of SF, which is quite a feat. Josh was approachable, dependable, and always made me feel like my questions and concerns were heard. I would highly recommend them to anyone looking for a trustworthy contractor.Posted on Yelp Susheel B.Verified RWB know what they are doing! We had a 850 sqft story addition done that needed basement retrofit, foundation upgrade, framing, plumbing, electrical, bathroom installation, flooring, tiling and detailing work. They have a diverse crew of experts and a very personable Project manager. Josh, the owner is in constant touch and guides the process along. The crews are also very supportive of their owner which shows their work culture. I would advise any one who is looking for a decent size project or a remodel to meet up with Josh and explore working with him.Posted on Yelp Stan S.Verified We just finished a major home addition, kitchen remodel, covered patio, and HVAC modernization project with RW&B. I told Josh in our last conversation that I'll call him for the next one. I highly recommend them. There are some mechanical things about doing a major project that matter for your quality of life, on which RW&B is excellent. 1) The team is there every day. 2) Change orders are straightforward. 3) Specialists are scheduled promptly and are reliable. 4) Parts purchasing is well planned. 5) The job site is clean. 6) Communications are frequent and consolidated in the group chat. Where RW&B really stands out is design vision and finish quality. We took 5 bids for the project. We chose to go with Josh because in our first meeting, he took the time to inspect and understand the space and the opportunity. He translated our idea and improved on it--throughout the project. In the kitchen, he's the one who suggested moving the range to the other wall, freeing up the floor-to-ceiling pantry cabinets and built-in appliances we wanted. For the covered patio space, all I had was a shape and vibes. He took that roughest outline, built it out, made suggestions for the finishes, and designed the beam wraps which took it to the next level. We felt that he & the team shared our desire to build something that mattered. Living in the space now, we can't even remember the before-time. It feels so natural, and fits what we wanted exactly. Highly recommend Red White and Blue Construction.Posted on Yelp tanja c.Verified We had an excellent experience with RWB Construction on our bathroom renovation. Josh was the first person out of three we interviewed and he spent over 1h with me discussing design options and construction details. Of course, there are always some unexpected surprises when you open up an old house, but overall, the project stayed on budget and on time. I highly recommend this very professional company and look forward to making the rest of the house looks as great as the bathroom :) Bonus: the team took pictures throughout the construction and I can now review the astounding transformation in a little movie.Posted on Yelp Alan H.Verified We just completed a major home addition with Red White and Blue Construction and couldn't be more satisfied with how the whole project went. We changed our minds on a couple of things mid-build, something that can easily throw off a project, and RWB made those adjustments with minimal disruption to the schedule or budget. That kind of flexibility is hard to find. On a project this size, a few things came up along the way, and when they did, RWB was upfront about what was happening and worked to minimize the cost impact while keeping things as close to the original timeline as possible. Communication was excellent throughout. They're consistently transparent and proactive, and they follow up on anything that needs attention without you having to chase them down. What sets them apart is that they're genuinely invested in the outcome. They stand behind their work with a warranty, and it shows in how they operate. At this point we see RWB as a long-term partner. We have more work we want to do on our existing home and they'll be our first call every time. Highly recommend for anyone looking at a significant construction project.Posted on Yelp Elise G.Verified Red White & Blue recently remodeled two of our bathrooms, and we're very happy with the outcome. The team communicated constantly throughout the project, and they delivered high-quality work with 0 delays. They listened to what we wanted, handled the details really well, and kept the process smooth from start to finish. Both bathrooms are well-built, and we'd feel confident hiring them again for future projects.Posted on Yelp Sonia S.Verified We worked with Red White and Blue Construction in Berkeley on a full kitchen remodel that included removing two structural walls, adding a shear wall, and redoing the entire space. The kitchen now looks great and feels so much better to use. They gave us fair prices on all the change requests we added and came up with creative ideas whenever tricky situations came up during construction. It was a complicated project, but everything came together really well in the end. We're very happy with how it turned out.Posted on Yelp Jessie H.Verified We recently remodeled our bathroom and could not be happier. Josh and his team handled everything--plumbing, electrical, tiling, and installation--and the finished space is beautiful. One of the best parts of working with this company was having an in-house designer. Jocelyn guided us through showrooms, helped us stay on budget, and made design choices so much easier. The crew was professional and reliable throughout the entire process. We highly recommend them to anyone considering a remodel!Posted on Yelp Shin Y.Verified I've got to say, out of all the requests that I've set out to various companies, this is the only contractor who turned down the project without even bothering to see the space, request photos, or at least a phone call to clarify the details of the project. I'm well aware these projects have minimums to meet, but it's honestly pretty disappointing to see a project dismissed based on a quick message rather than taking a moment to properly assess the full scope.Posted on Yelp Michael B.Verified Red white and blue did a spectacular job remodeling my kitchen... They had a project manager following every step of the way... and the workers doing the work were skilled, hard-working, and pleasant to have around my house... My kitchen had to be completely gutted and then rebuilt, and it took a little over five weeks... Quite incredible... Thank you red white, and blue...
#1 Bay Area Accessory Dwelling Units Contractors: RWB Construction Experts
Accessory dwelling units (ADUs) in the Bay Area of California are changing the way homeowners think about primary residence and property value. With prices rising, overcrowding, and the need for flexibility, ADUs are a hot ticket. ADUs are the new go-to way of living for many, so they are getting attention. The first step to navigating this complicated yet exciting process is working with trusted pros like RWB Construction. From their great work and unique designs to local knowledge, they are the best Bay Area ADU builders.
RWB Construction is not just a builder but a partner in making your ADU dream a reality. As the top Bay Area ADU builders, they bring expertise, dedication, and a process to every project. Don’t leave your ADU to chance – choose RWB for a seamless experience. Contact them today to schedule your consultation and get started.
What Are Accessory Dwelling Units?
An accessory dwelling unit is a small, self-contained unit that can also be referred to as granny flats or in-law units. It’s located on the same property as the main house (backyard) They have a bedroom, bathroom, kitchen, and living space and are a fully independent living environment. Whether attached to the main house, above a garage, or a separate structure, ADUs blend in with almost any property layout.
Why Build an ADU?
Property owners are choosing ADUs for good reason: they are practical and profitable. Increased property value makes them a smart investment, as potential buyers see ADUs as a bonus. Rental income opportunities are another big draw, as these units can be rented out as long-term housing or vacation rentals. For families, ADUs offer flexibility, whether it’s housing aging parents, providing a home for grown children, or a private workspace.
With the housing crisis in the Bay Area, the ADU boom is here. Families are responding to the skyrocketing home prices by investing in ADUs as a more affordable way to maximize their assets
There is also a growing trend of multi-generational households, which is only possible because of ADUs. Cities across the Bay Area are now relaxing restrictions on ADUs, so now is the time to start planning and getting building codes.
Why RWB Construction is the Best for ADU Builders
ADU Building Experience
RWB Construction stands out from the rest by focusing on one thing: results. The company has years of experience building ADUs in the San Francisco Bay Area and nearby areas like San Jose, which has given them knowledge of the unique challenges and opportunities of this region. From small spaces to cramped properties to complicated regional zoning to complex seismic issues, RWB has figured it out.
Custom Designs:
RWB doesn’t use cookie-cutters. Every ADU garage conversion project starts with discussing the client’s style, tastes, and needs. The design construction process is a marriage of imagination and practicality that is focused on more living space optimization and manifesting the client’s dream. Whether modern contemporary or cozy traditional cottage, cozy backyard cottage or something else, RWB can deliver on the design challenge.
Clear Communication:
Building an ADU is a big investment, so surprises can be a real pain for the homeowner. RWB makes sure to communicate everything from the get-go with detailed estimates, achievable timelines, and progress reports. You’ll always know what to expect from RWB because they are transparent – no unlisted costs and no playing games.
Permitting Process:
The toughest part of building an ADU in the Bay Area is getting permits. Luckily, RWB is here for you. They handle the entire permitting process, which includes filing applications and making sure all state and local requirements are met. Homeowners save time, money, and mistakes with their services.
The ADU Project Process with RWB Construction
Consultation and Site Visit
RWB’s ADU journey starts with a consultation. At this stage, the team comes to your property, listens to your ideas, and assesses what can be done. They will advise you on zoning regulations, design possibilities, and budgetary issues so you know what to expect.
Planning Phase
Once the scope of work is defined, RWB will work with you to develop a functional and beautiful design. This phase includes balancing your personal vision with practical elements like more space and legal requirements. The team works closely with architects and engineers to get it right.
Construction and Quality Control
Once designs are approved and permits are on hand, construction begins. RWB’s team handles everything, from foundation to finish. Throughout the build, they focus on quality. Every material, fixture, and structural element is chosen and installed with precision to meet the highest standards.
Final Inspection and Handover
Before the project is complete, RWB will do a thorough inspection to make sure the ADU meets all safety, code, and design requirements. Once everything is checked and double checked, the keys are handed over, and a new chapter begins for the homeowner. The result is a beautiful, functional space ready to serve its purpose
What Homeowners Are Saying About RWB Construction
Reviews:
RWB Construction has people who live and breathe customer satisfaction as they get praised for their customer service and workmanship. Clients have a lot to say about their professionalism, skill, and efficiency too. One happy homeowner said, “RWB made my ADU dream come true. From the initial consultation to the final walkthrough, they were awesome. Highly recommend!”
Real-Life Examples of Transformed Properties:
From empty backyards to thriving living spaces, RWB’s work has made a real difference. #1 In the Bay Area family built an ADU for their aging parents so they could have a comfortable yet private space while staying close to loved ones. Another client turned their unused garage conversion into a rental unit that now generates a steady income. Every project is an example of how RWB can unlock the potential of any property.
FAQ's
What is an ADU, and what types do you build?
An Accessory Dwelling Unit (ADU) is a secondary housing unit on a residential property, designed to function independently with its own kitchen, bathroom, and sleeping area. We build several types of ADUs, including detached ADUs (a separate structure in the backyard), attached ADUs (connected to the main home), garage conversions, and basement or attic ADUs. Our team handles everything from site assessment and design to permitting and full construction.
Do I need a permit to build an ADU, and can you help with the permitting process?
Yes, an ADU requires permits, and regulations vary depending on your city or county. We handle the entire permitting process on your behalf, including site evaluations, drafting plans, submitting applications, and coordinating with local building departments. Our team is experienced with zoning laws, setbacks, height restrictions, and occupancy requirements to ensure your ADU is fully compliant.
How long does it take to design and build an ADU?
The ADU process typically takes 6 to 12 months from initial consultation to final completion. The timeline includes:
- 1–2 months for design and planning
- 2–4 months for permitting and approvals (depending on local agencies)
- 3–6 months for construction
Detached ADUs usually take longer due to foundation work, while garage conversions and interior ADUs can often be completed more quickly. We provide a detailed project timeline after your site visit and design review.
How are utilities handled for an ADU—will it need separate connections?
Utilities for an ADU can be configured in several ways. Some homeowners choose to share existing connections (e.g., water, sewer, electric, and gas), while others opt for separate meters for rental or billing purposes. We’ll review your goals and local utility regulations to determine the most cost-effective and code-compliant solution. Our licensed electricians and plumbers will ensure everything is safely and professionally installed.
What financing options are available for ADU construction?
There are several financing options available for ADU projects, including home equity loans, cash-out refinancing, construction loans, and specialized ADU financing programs offered by some local governments and lenders. We can help connect you with trusted financial partners and guide you through available grants, rebates, or incentive programs in your area. A clear cost estimate will also help you determine which financing path makes the most sense.