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ADU Contractors in Contra Costa County

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San Francisco / 50 mi
Accessory Dwelling Units
1 – 15 of 1,472 professionals
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1,472 Professionals

Featured Reviews for ADU Contractors in Contra Costa County

Mayer's Construction and Remodeling
ADU Contractors in Contra Costa County
Average rating: 5 out of 5 starsDecember 4, 2022
“Great experience, high value, very reliable and best crew we ever worked with. Mayer’s construction did a home remodeling for us during the last 6 months. It has been a big home remodel for us that took design and build as well. After months spending finding the right company for us, we have choose to work with Mike & Nathan Mayer from Mayer’s construction. A week after finalizing contract we started working with Su & Luis both company’s architect and engineer. We worked on the new plans we agreed and wanted at first and started to have architect drawings ready, when we got into engineering process, both Mayer’s construction and us didn’t know we were suppose to redone so much of the existing footings and reinforce of additional walls as 20 years ago we did a 2nd story addition that was probably made poorly and unprofessional. They were extremely kind and helpful and kept the price as we agreed on and didn’t changed a thing. The plan process and measurements took about a month or so, and finally we were able to submit the plans to the city of San Jose. After getting the permits done and job card set ( overall 5 months of waiting / SJ is a pretty busy city) we got into work schedule and been ready to move out as the entire home going to be demolished. Mike was very organized both managing and scheduling the team, rough materials arrivals, and to us to be fully briefed with details and what we need and when. The process of work was great and on timeline , city did changed a lot during this time period with their inspection delays but it didn’t interrupt with our schedule or timeline due to great management ahead. We just finished our work and we absolutely in love with our new home! New flooring throughout, new kitchen, new bathrooms, complete open floor plan, new stair case, new rooms reconfigured, new paint, new texture, new windows and sliding doors throughout, all new plumbing and electrical. A brand new and beautiful home we got thanks to Mayer’s construction and the team, Mike, Nathan, Raul, Jose and many more who had a added value and did this work absolute best.”
True & Square Construction Inc.
ADU Contractors in Contra Costa County
Average rating: 5 out of 5 starsFebruary 24, 2023
“I have a Historic Victorian Hotel in San Francisco, and the True and Square Team have done amazing work to help me preserve and restore my building. A very creative crew that can seemingly do everything, right up to final painting!!!”
New Key Construction
ADU Contractors in Contra Costa County
Average rating: 5 out of 5 starsJuly 25, 2019
“NewKey has been by far the best GC in the Bay area I have ever worked with. From the start of planning, to the coordination with their subs and team members for installs, they have been very detail oriented. As challenges arise which they always do, they actually pick up the phone when you call and work on resolutions within hours not days or weeks! I am thrilled with the progress and would recommend them to anyone. Now that I have a great remodeled kitchen - I look forward to them doing my master bath!”
Creation 7
ADU Contractors in Contra Costa County
Average rating: 5 out of 5 starsJanuary 23, 2017
“Creation 7 build the master addition on our house. It is generally understood that having major remodeling done on your house, can be a frustrating process. It's noisy, messy, and usually, goes over budget. I can honestly say that almost none of these were true for our experience with Creation 7. The men were so respectful of our space. They cleaned up at the end of the day - no mess was ever left. The construction generally stayed within budget. These guys were a pleasure to be around also. They were funny and nice, but also respectful of our need for privacy. Also our completed addition! It's so gorgeous! Everything is in perfect working order. Their eye for detail and overall craftsmanship is amazing. I really can't say enough how great our en suite master bedroom is. It has transformed our house from an old boring space into our dream house. I highly, highly recommend Creation 7!”
Kyvos Construction
ADU Contractors in Contra Costa County
Average rating: 5 out of 5 starsJune 20, 2019
“Very good experience He help us out a lot with our kitchen project remodeling and Answering all our questions that we have”
Rhino Builders
ADU Contractors in Contra Costa County
Average rating: 5 out of 5 starsMay 5, 2022
“Rhino was able to provide me with the most quality deck build service I felt comfortable paying for in my area. They had all of the qualifications that I was looking for and their employees were super nice and their job quality was superior.”
Keystone Home Improvements Inc
ADU Contractors in Contra Costa County
Average rating: 5 out of 5 starsJune 15, 2020
“Manny and his crew are on time, honorable, efficient and extremely neat. The Keystone builders installed our new kitchen, doors, windows and even rain gutters plus repaired tiled flooring with minimal disruption and lots of care. The work was so meticulous I was able to delay the interior painting for another year and instead their awesome team painted the exterior of the house in half the time we planned. I look forward to working with them again!”
BuildingCa
ADU Contractors in Contra Costa County
Average rating: 5 out of 5 starsApril 28, 2017
“I found GreenStar Construction through word of mouth. I was impressed by the designs my colleague showed me with such a substantial budget on their home, so my wife and I decided to go with them. We were re-designing our kitchen. We changed countertops, sinks, backsplash and cabinets. The owner gave us phenomenal options to choose from within our budget. Jay has an eye for design which my wife really appreciated. He always answered our calls, answered all of our questions, and went up and beyond to make sure we stayed within our budget and were satisfied. Thanks Jay, my wife loves her new kitchen.”
NuHome Remodeling
ADU Contractors in Contra Costa County
Average rating: 5 out of 5 starsNovember 23, 2020
“Tony and his team did an excellent job . They expanded my master bedroom including the bathroom and a walk in closet. I am not the easiest customer. I had so many questions, and Tony was patient with me every step of the way. They were very thorough and competitive. They were constantly updating me and going over the process . The entire experience was great!! Always on time with a great attitude. I want to say that I worked with a few general contractors over the years and it is difficult to find a good one that actually keeps you updated. If you are looking for a good contractor, look no further! I am very satisfied!!! Thank you Tony and Nuhome! -Clement”
AA Quality Construction
ADU Contractors in Contra Costa County
Average rating: 5 out of 5 starsJanuary 20, 2023
“AA Quality Construction remodeled my bathroom in 2022. The workmanship was great and they were very professional. I would recommend them to anyone looking for quality remodeling company. They provided high-quality materials and excellent craftsmanship, and I am extremely happy with the results. I really appreciate the customer service I received from AA Quality Construction. All my questions were answered in a timely manner, and I felt that they had my best interests in mind throughout the entire process.”
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ADU Contractor FAQs
Just answer a few questions to get matched with a local ADU Professional.
Or browse through the list of trusted ADU Professionals in Contra Costa County on Houzz: See Contra Costa County ADU Professionals’ profiles, dive into their work photos and check out customer reviews.
  1. Reach out to the pro(s) you want, then share your vision to get the ball rolling.
  2. Request and compare quotes, then hire the ADU Professional that perfectly fits your project and budget limits.
The most popular ADU Professional Services in Contra Costa County are:
  • ADU Design and Planning
  • ADU Construction and Installation
  • ADU Conversion
  • ADU Permitting and Code Compliance
  • Accessory Dwelling Unit Architectural Services
  • ADU Interior Design
  • ADU Consultation and Project Management
There are 1,617 ADU Professionals, registered on Houzz in Contra Costa County.

An accessory dwelling unit (ADU) is a separate living space that can be added to your property. It functions as an additional dwelling on the same land where your main home is located. ADUs have their own amenities and entrance, providing a self-contained living area. Unlike a traditional home, an ADU cannot be sold separately and is considered part of the same property.

ADUs are subject to specific zoning regulations and building codes in Contra Costa County. These regulations determine where and how an ADU can be constructed, ensuring compliance with local laws and requirements. It’s important to consult with local authorities or a professional contractor who is familiar with ADU regulations in your area to understand the specific legal differences and ensure your ADU meets all necessary criteria.

Consider these options for cost-effective ADU:
  1. Prefabricated ADUs: Affordable and easy to assemble, they’re a practical choice. Many prefab ADUs cost under $100,000.
  2. Traditional Construction: Work with an ADU contractor to find budget-friendly options and make smart choices.
Tips for cost-effective ADU construction:
  1. Define your needs: Determine the purpose of your ADU, whether it’s for family, rental income, or a home office.
  2. Consult a contractor in Contra Costa County: Their expertise can help with cost-effective materials, designs, and planning.
  3. Prefabricated components: Consider using prefabricated elements like cabinets or bathroom fixtures to save time and money.
  4. Explore financing options: Look for ADU-specific loans or programs to help cover costs.
Ensure compliance with local regulations and seek professional advice. A knowledgeable contractor can make the process smoother and cost-effective.
Why Hire Accessory Dwelling Units on Houzz?
1,472Local Pros on Houzz Who Serve Contra Costa County, CA
1M+Total Number of Reviews Left by Homeowners
The cost to build a pool in Contra Costa County, CA can vary widely based on factors such as size, type, and location. For detailed cost estimates, check
out the In-Ground Pool Cost.