How much do addition contractors typically cost?
- Sunnyvale, California Average$104,095
- Typical Range$60,000 - $242,000
- Low End - High End$14,000 - $242,000

Garage Remodels, Kitchen Remodels, Bathroom Remodels , and 1 more
"Rose Remodeling & Design handled our living room remodel with skill and care. I appreciated how approachable everyone was and how willing they were to explain things. The result is a space that feels both stylish and cozy."
0B2A739D1BE9F14C663C05B77E911DF385077D0173AD8D434BD9C5CF211A0098 8. in December 2025

Custom Homes, ADU, Additions , and 6 more
"Jorge did an outstanding job remodeling both of our bathrooms and replacing all of the water pipes throughout our house. The quality of his work was excellent, and everything was completed professionally with great attention to detail. Jorge is reliable, trustworthy, and extremely responsive. He kept us informed throughout the project, addressed our questions promptly, and always followed through on his commitments. He is someone you can truly trust to do the job right. On top of that, he went above and beyond by replacing a few additional items at no extra charge, including our kitchen sink and several shutoff valves. Those thoughtful extras showed that he genuinely cares about his customers rather than just finishing the job."
336C89BC7193DCD8CB0813A2D27332613E9D9E00A5F3483FC6B838CA8AA6C5C8 7. in September 2026

Kitchen Remodels, Bathroom Remodels, Full Home Remodels , and 2 more
"The kitchen remodel came out great 👍"
5B42398B507822F7F7C4E75F4347AF70BC94A05BC8BA12F58430B2D751AE4744 B. in December 2025

Remodel Kitchen, Full house remodeling and reconfiguration, Additions to Existing Structure , and 2 more
"ON Design & Remodeling team exceeded our expectations with their kitchen remodeling services. Thanks to Razs remarkable project management skills, the remodeling stayed right on schedule and was completed without any delays. They were professional, efficient, and the end result is a dream kitchen we absolutely love."
Shavi S. in December 2023
Home Remodeling, Kitchen Remodel, Home Additions , and 2 more
"Absolutely thrilled with my bathroom transformation ! Waves remodeling revamped everything, from floor-to-ceiling lights, and a gorgeous walk-in shower. Their work exceeded my expectations."
stella D. in September 2023

Excavation, Remodeling & Renovations, Flooring Installation , and 4 more
"Russel and team were so wonderful to work with! He came out to my studio multiple times to discuss the project and make sure all my concerns were addressed. He was great at communication and efficiency. He was very professional and would highly recommend using him!"
0725C9AEF39B05F17C7FBBAC8094EB3F6CC2A98B74AFC2B009B696E86B34E53A B. in March 2024

Additions, Garage Remodel, Kitchen Remodels , and 5 more
"After years of putting off renovations, we finally committed to remodeling nearly every room in our house. Najia guided us through material selections and layout improvements that made the process much easier than expected. The home now feels completely renewed."
08B71A85F3C48AA9A6BA29BC2785C39B60D313659A55051A80B96B61E6349D72 4. in July 2026
Doors, Carpentry, Plumbing , and 1 more
"Karol is a very reliable and skilled professional. He approaches any sized job with focused approach and positive attitude. I know I can count on him to get the job done."
Javier R. in May 2022

Addtions Remolding
"I want to share my experience with Unique Home Design & Remodeling because after a while of hesitating, checking and trying to make a decision of if I should start the remodeling of my kitchen I want to write that my decision was right on. I truly didn't know what to do so I searched online and saw several home improvement companies but the prices were a little high. When I met with Unique Home Design & Remodeling, I was clarified at first how easy it is. I was very happy after my meeting and quote with them and I was wondering if it's possible. At the third meeting, they presented me several designs and the price for each one of them. I went ahead with them and I hired them for my kitchen remodeling project. Honestly after the kitchen was completed, I really don't want to eat out no more lol! I love my new kitchen more than the other spaces of my house."
Dave M. in July 2018
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Depending on the type of project, you may find subtle differences in the hiring process. Here’s a look at task-specific advice.
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Your research doesn’t stop here. Once you’ve found a few prospective companies, make an call to ask a few questions about work history, licensure and more:
In most cases, the responses you get to these three questions will give you a very good idea of the right pro for your project. If you have more than one front-runner, these additional questions can help you narrow it down.
Any good contractor will answer these questions, and most will appreciate dealing with a client that takes such an active interest in finding good service. On the other hand, if a contractor gives you a hard time with these questions, you probably want to find someone else.
Sunnyvale Addition & Remodeling Contractors are rated 4.9 out of 5 based on 409 reviews of 409 pros.
The HomeAdvisor Community Rating is an overall rating based on verified reviews and feedback from our community of homeowners that have been connected with service professionals. See individual business pages for full, detailed reviews.
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