How much do addition contractors typically cost?
- San mateo, California Average$98,346
- Typical Range$50,860 - $161,750
- Low End - High End$5,800 - $300,000
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Service Pros
DC
Pittsburg, CA·
Kitchen Renovation, Additions, Deck Builds , and 8 more
"Really happy about my bathroom renovation. Working with these guys was great! Their project manager, Zamir was transparent to me and my family about prices and costs, and he also brings a creative edge to his work. The rest of the team are just as great, they all have great humor, and really get to job done. Jose on the tiles in particular really stood out. Overall very happy with the work, idea came to life!"
D725511118FF382D6473C39459D69CABC295C043E1E7ABDC25A365CB2D224C55 F. in July 2025
San Jose, CA·
Renovations, Landscaping, Roofing , and 1 more
"Good service, competitive prices, completed the project on time!"
BFF70485135C547322B677792B3900D8B08BCD88960903699A3B0B6E7B6E205A 7. in December 2024
Sunnyvale, CA·
Garage Remodels, Kitchen Remodels, Bathroom Remodels , and 1 more
"Rose Remodeling & Design just finished our master bath remodel, and we are thrilled. Adir has such a great eye for design and gave us amazing recommendations on materials. The tile work is flawless, and the space now feels like a spa. His team worked neatly and professionally from start to finish. We couldn’t be happier with the transformation."
51651DE003EE7D32325187D7AF64716B8718E8F6B068F1D6C53B810278FD4FD0 2. in December 2025
Redwood City, CA·
Addtions Remolding
"I am so happy I hired Unique Home Design & Remodeling for my bathroom remodel. I had never worked with this company but hen I saw my friends remodeled bathroom I asked him for contact and he gave me contact of this company. They were honest from start to finish, my new bathroom looks even better than from my friends and price was reasonable. Highly recommend!"
Martin B. in September 2019
Sunnyvale, CA·
Full Service Plumbing Company, Full Service Electric Company, Full Service Surveillance Needs , and 2 more
"Great costumer service. Was more then helpful with getting our project done on time. Even finished ahead of schedule. Would highly recommend using this company they are flexible with your needs."
Garrett D. in August 2021
San Jose, CA·
Major Home Repairs, Additions to Existing Structure, Remodel Bathroom , and 1 more
"We used Future Vision and Remodeling to remodel our master bathroom. Throughout the process, everyone was responsive. They followed through on everything they promised for the price they promised. I had gotten 3 quotes, and decided to go with them because they were so much more professional than the others. They always made sure I am happy throughout the entire process, and we had good communication via text, emails, and phone calls. Highly recommended."
Aviva H. in December 2016
San Jose, CA·
Additions, Major Renovations, Kitchen Remodels , and 17 more
"We had our two bathrooms fully remodeled by Golden View 4 years ago, and were very happy with the results. Recently we noticed a leak from the shower in one of them that was affecting the nearby flooring. Asaf and the team really came through for us, they diagnosed the problem - a shower pan leak - opened the walls to clean and mitigate mold, planned and executed a partial demolition and rebuild of the shower including an improved method for waterproofing, and restored the bathroom and walls back to original condition and full functioning. All of this and they didn’t charge us, since Asaf told us he wants to stand behind their original work and fix problems arising. Five stars for sure!"
4EAD13B3B5C9E15BD3F1172F3A0CB83F68D9B7DAB1BD2D5895C7F395BC4C840C C. in July 2025
San Jose, CA·
Kitchen Remodels, Major Renovations , ADU , Design service, roof , and 2 more
"After they redid our counter tops and island, we had them paint out cabinets and build shelves up to the ceiling. The communication was on point this time and the results speak for themselves. Would definitely recommend them to anyone for any home project."
579B05ED6C49D67A382683F5EBB77926035FDC4FE13C89D2670E2EA034DA6B6C 1. in December 2025
UC
San Bruno, CA·
Addition to Existing Structure - Build, Major Renovation - Multiple Rooms, Kitchen - Remodel , and 2 more
"What I really liked about working with Universal was our direct interaction with Fred, and the fact that he was patient with us in making decisions. I never felt rushed and appreciated his customer service."
Nicole M. in February 2016
Showing 1-9 of 17 results
Costs for related projects in San mateo, CA
- Build an Addition$50,860 - $161,750
- Demo an Interior$0 - $2,000
- Perform Home Renovations and Repairs$3,500 - $24,075
- Remodel or Renovate a House$54,666 - $131,800
Frequently asked questions
- It’s important that you verify their license is still in good standing. Also keep in mind that certain states or provinces don’t require licensing if the job is under a certain dollar amount.
- You can find a list of your state’s licensing requirements on the HomeAdvisor website. Before you get to work with the pro, make sure their qualifications are current and acceptable to you.
- It is always a good idea to get a copy of the pro’s insurance certificate for future records, and in case anything happens. This is a good way to feel more secure in your home project, and to weed out potential scammers.
HomeAdvisor makes it easy to connect with pros near you. You can read reviews, get quotes and book appointments all in one place.
Depending on the type of project, you may find subtle differences in the hiring process. Here’s a look at task-specific advice.
You can use HomeAdvisor to help evaluate a contractor’s qualifications. We put pros through a screening process, and award badges to high-performing contractors. You can find these badges on a pro’s HomeAdvisor profile, and sometimes, his or her website.
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:
- Have you completed a job like this before?
- Do you have a list of references I can contact?
- When are you able to start the job?
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.
- How many years of experience do you have?
- What’s your permanent business address?
- Are you licensed to work in my area?
- When did you earn your business license?
- How do you handle warranty service complaints?
- Do you have worker’s compensation, property damage and personal liability insurance?
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.
Related Projects in San mateo, CA
HomeAdvisor Community Rating
Overall Rating:
San mateo Addition & Remodeling Contractors are rated 4.9 out of 5 based on 457 reviews of 457 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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Recent Job Requests for Addition & Remodeling Contractors in San mateo, CA
Project Location: San Mateo, CA Date: 02/05/24Type of Addition: Ground level additionWhat types of rooms/spaces are you interested in adding to your home?: Bathroom(s)What types of rooms/spaces are you interested in adding to your home?: Bedroom(s)Project Description: Design and buildComment: Customer did not provide additional comments. Please contact the customer to discuss the details of this project.Project Location: San Mateo, CA Date: 02/02/24Type of Addition: Second story additionProject Description: Design and buildWhat types of rooms/spaces are you interested in adding to your home?: Bathroom(s)What types of rooms/spaces are you interested in adding to your home?: KitchenWhat types of rooms/spaces are you interested in adding to your home?: Living/family roomWhat types of rooms/spaces are you interested in adding to your home?: Bedroom(s)Comment: Customer did not provide additional comments. Please contact the customer to discuss the details of this project.Project Location: San Mateo, CA Date: 01/28/24Type of Addition: Ground level additionProject Description: Design and buildWhat types of rooms/spaces are you interested in adding to your home?: Bathroom(s)What types of rooms/spaces are you interested in adding to your home?: Bedroom(s)Comment: Extend smaller bedroom and add a door to backyard from it and add a bathroom to itProject Location: San Mateo, CA Date: 01/27/24Type of Addition: Detached additionProject Description: Design and buildWhat types of rooms/spaces are you interested in adding to your home?: Bathroom(s)What types of rooms/spaces are you interested in adding to your home?: KitchenWhat types of rooms/spaces are you interested in adding to your home?: Living/family roomWhat types of rooms/spaces are you interested in adding to your home?: Bedroom(s)Comment: Customer did not provide additional comments. Please contact the customer to discuss the details of this project.
