How much do addition contractors typically cost?
- Sonoma, California Average$159,166
- Typical Range$112,500 - $159,166
- Low End - High End$35,000 - $275,000
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Service Pros
Sebastopol, CA·
Remodeling Bathrooms, Garage Building, Handyman Projects , and 2 more
"Jason and his crew were great and made the whole experience quick and easy! I had them fully remodeled my kitchen - floors, cabinets, windows, countertops, and put on a good layer of paint. Will use his service in the future!"
4EAD13B3B5C9E15BD3F1172F3A0CB83F68D9B7DAB1BD2D5895C7F395BC4C840C 6. in July 2026
"GREAT WORK GREAT COMMUNICATION. Jay listened to our needs and wants, gave us the right price and delivered on time when it came to completing a very nice master bath remodel for us. Thank you Jay!! ( we did not feel like we were juggled in between other customers which is a huge plus for us)."
B6A8193F5BDA341EF44444AAD719348BEC8A8CE06FE06BB5F4478B2BF558D65E D. in August 2026
TB
Santa Rosa, CA·
Siding Repairs, Additions, Painting , and 1 more
"I hired them to do pest repair and paint the outside of my house as I was prepping for a sale. The quality of the work was excellent. I was informed at every step if something additional needed repair and given options. The paint job was superior. They let me know when the were coming, always showed up on time and didnâ t leave until the work was done. I highly recommend their company."
Sandy J. in April 2023
BB
Novato, CA·
"John was wonderful to work with. The work involved turned out to be a lot. His quote was very reasonable and he more than earned it! John is a perfectionist. Every detail was finished to perfection. Our tastes were similar and I got exactly what I wanted. The people he hired to do the plumbing and turn an old yellow bathtub to gleaming white were also excellent. I am thrilled with my new shower! I highly recommend John Cutrufelli, Bay Builders Inc."
BD4D9CD01269099966516A57322485A5940A66784CB9A6432563B69DF9208F47 4. in June 2026
Rohnert Park, CA·
Handyman for Multiple Small Projects, Handyman Doors, Door or Window Screens - Install or Repair , and 1 more
"He builds 3 decks for me, they were large decks, he also extended the roof over one of the decks, and he fixed one of the decks, that was flooding with rain. He is easy to work with, explains everything, got the work done quickly, and on time. He is professional, reliable, and hard-working. No issues, no problems. He has done many projects for me, he does more than just decks. He has done windows, remodeling work, painting, and also put on a bathtub. He is the one I always call."
Wendy W. in May 2021
Concord, CA·
"Yes. The remodeler was on time, worked efficiently, cleaned up after himself, and because Eric was experienced in remodeling, he knew exactly what to do so everything went smoothly. Thank you. The bathroom looks great!"
Keith B. in December 2024
RC
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About us: "We are a general construction company that manages and oversees residential and commercial projects, coordinating all phases of construction from planning through completion."
HC
0
Oroville, CA·
About us: "Over 30 years of experience. One call does it all!!"
RO
In business since 2019
Santa Rosa, CA·
About us: "With over 15 years of professional remodeling experience, we are here to address any home improvement needs you may have. Give us a call today for your remodeling needs!"
Showing 1-9 of 14 results
Costs for related projects in Sonoma, CA
- Build an Addition$112,500 - $159,166
- Demo an Interior$5,000 - $5,808
- Remodel or Renovate a House$30,000 - $60,000
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 Sonoma, CA
HomeAdvisor Community Rating
Overall Rating:
Sonoma Addition & Remodeling Contractors are rated 4.9 out of 5 based on 39 reviews of 39 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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