How much do addition contractors typically cost?
- Ontario, California Average$45,181
- Typical Range$0 - $75,000
- Low End - High End$13,000 - $100,000
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Get Quotes NowAddition Contractors in Ontario, CA
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Service Pros
sherman oaks, CAΒ·
Additions and Remodels
"We hired Ben to remodel our living room and kitchen, which included adding approximately 300 square feet, creating an open floor plan, and removing an enormous brick fireplace in the center of our house. From day one, Ben was amazing to work with. He was on budget, on schedule, professional throughout the entire project, and consistently anticipated potential issues before they became problems. His wealth of experience was incredibly valuable when it came to making decisions along the way, and he was always willing to offer thoughtful advice and guidance. His entire team was fantastic as well: professional, respectful, and clearly committed to doing quality work. We couldnβt be happier with the results and our experience working with Ben. We highly recommend Ben for any remodeling, building, or construction project!"
4962401849CF53F36FD7DFBFDB9CEF6837B81E394192E3F3ADBEB35C88D18EC4 D. in September 2026
Ontario, CAΒ·
Remodeling, Additions, Framing , and 2 more
"We are extremely pleased with our remodel. Jorge was so pleasant and thoughtful, and interested in what we wanted. Our front bathroom needed redoing for my mother's handicap needs, and our request was for an ADA-compliant bathroom, with room for a wheelchair if necessary. He walked us through every detail, came with us to the Floor & Decor, where we got everything we needed or wanted. He is a consummate professional, and even corrected some issues that were found when the bathroom was gutted while construction was underway for the shower. Jorge saw that we passed inspection every time. I loved that he asked our opinion and approval on everything so that it was just how we needed and wanted the job to be. We are so happy with the job Jorge and his crew did, that we are looking forward to his company working on some more projects later on this year. His subcontractors (electrical, tile, plumbing, carpentry, glass) are all wonderful to work with. Thank you so much Jorge!"
2DFF2F7865CE2E706185200E7B9E89DEE0571094DF7ECBD7385A4EF74192E9D3 B. in May 2026
Chino, CAΒ·
Water and fire damage restorations, Additions and Remodels.
"He built my house and is now in the process of building my second house. I highly recommend him."
Leonard B. in November 2017
"I contacted this company due to damage on my wall, they replaced drywall and painted looks brand new like nothing happened very happy with results"
DED9FA500CCEA25C1056A4650C24857661A311572E500026FFEA46E2D5144FDC 6. in September 2026
Studio City, CAΒ·
"I was able to get the kitchen of my dreams, with this wonderful remodeling that they did to me, it turned out just as I wanted it, really thank you very much"
35C4BAEC5608056D82A4CA82EA2BBEF0857046B21E6360E11DA790C813ADBF84 D. in September 2026
GRANADA HILLS, CAΒ·
Additions, ADUs, New Construction , and 1 more
"πππ»ππ»ππ»ππ»ππ»ππ»ππ»ππππππ₯π₯π₯π₯best contractor"
CF9F68675DFF42E1A4CFF34113A0F5CE4A841045088CF99F1EDBE41BF1C38897 6. in August 2026
Pomona, CAΒ·
construction, remodeling, concrete
"Absolutely great work"
5597FFC0D90EB19A301C96382E0D1F5573CB3985DEED095714BCDBA790EACEC4 F. in September 2026
KR
Woodland Hills, CAΒ·
"KN Remodeling redid my floors, removed a wall and got my JADU permitted, plus many more random fixes. Whatever project I threw at Nathan and his team he got done. They were great and I would use them again."
59EFDE4F84529BBA2F31DB4E7B45C3C00880BF60F8467DA34D66833C954EB99B C. in May 2026
Chino Hills, CAΒ·
ADU, Additions, ADU , and 1 more
"The owner takes pride in his work and is involved and a great communicator."
Martin X. in March 2018
Showing 1-9 of 27 results
Costs for related projects in Ontario, CA
- Build an Addition$0 - $75,000
- Demo an Interior$0 - $22,000
- Perform Home Renovations and Repairs$2,000 - $40,000
- Remodel or Renovate a House$19,689 - $96,000
Frequently asked questions
- Itβs important that you verify their license is still in good standing. Also keep in mind that certain states or provinces donβt require licensing if the job is under a certain dollar amount.
- You can find a list of your stateβs 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 proβs 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. Hereβs a look at task-specific advice.
You can use HomeAdvisor to help evaluate a contractorβs qualifications. We put pros through a screening process, and award badges to high-performing contractors. You can find these badges on a proβs HomeAdvisor profile, and sometimes, his or her website.
Your research doesnβt stop here. Once youβve 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?
- Whatβs 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 workerβs 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 Ontario, CA
HomeAdvisor Community Rating
Overall Rating:
Ontario Addition & Remodeling Contractors are rated 4.8 out of 5 based on 126 reviews of 126 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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