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Addition Contractors in Ontario, CA

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Service Pros

    BB
    North Hollywood, CA·

    General Construction & Renovation, Bathroom & Kitchen Remodels, Design & Build Contractor , and 4 more

    "We hired David and Noah to do a gut renovation of our home in Santa Monica. We decided to hire them after interviewing six different contractors. From the initial phone call I had with the office I knew these guys were different. We were impressed to find that they were the only contractors to ask that I forward the blueprints we had so that he could come to the meeting prepared. When we met we immediately felt comfortable entrusting our new home to his company. Our project ended up being more difficult than we originally had thought. Some walls we wanted to remove were structural and almost every wall had plumbing. David and Noah, and their entire team handled each surprise like seasoned pros and these challenges did not stop their team from delivering the home we had envisioned. Santa Monica is also very strict with inspections. The office was scheduling inspections every time we needed and was very patient and professional working with the city. The quality of the work has been great and the team even occasionally reaches out to make sure everything is ok. I would not hesitate recommending them. At the end of the day they are really great people with a terrific team. They are professional and they stand by their work."

    Juliette L. in October 2024

    OC
    Rancho Cucamonga, CA·

    Addition to Existing Structure - Build

    "very clean work. finished on time and excelent costumer service !"

    Joe / Paola W. in December 2012

    MC
    Pomona, CA·

    ADU, Construction From Ground up, Full home Remodel , and 2 more

    "I chose this builder from a list of 8 contractors who provided me with quotes. He was confident in the time it would take to finish my complete demo and build of the ADU on my property. Instead of telling me what he was going to do he took the time to show me several current projects he was working on. I was impressed with the quality of work and the speed in which his team built my project. He is our only contractor that we will work with from here on out."

    Johnny M. in September 2024

    Jorcast Enterprises, Inc. Logo
    Chino, CA·

    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

    CD
    Banning, CA·

    Designer - Landscape

    "Creative Design went above and beyond the call of duty for our Project. Angiâ s Review should allow a category to be entered as well as a drop down list. We had a large and complex swimming pool completely removed and filled. Josh Bermudez was highly professional and efficient. He had the heavy machinery required to do this challenging job. He has knowledge of pluming, electricity, landscape grading and removal of concrete and rebar. His price was fair and the job was done quickly and perfectly. If you have a big landscaping job to do, Josh Bermudez is your man. His crew were also polite and professional. I want to adopt Josh Bermudez."

    Mick R. in November 2023

    PB

    "I hired a large company who hired ProServ as the contractor for the project. My contractor was incredible and efficient. Regretfully the company was not. Carlos, ProServ owner, made an incredibly awkward situation work out. I would give ProServ and especially Carlos rave reviews. The professionalism and honesty of the contractor and his crew is exemplary and quality of his work is exceptional."

    Lynda P. in March 2024

    David's Builders, Inc. Logo
    Chino Hills, CA·

    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

    AMERICAN REMODEL Logo

    Remodels, Framing, Additions , and 1 more

    "On time. Extremely friendly. Job got done professionally, no hiccups."

    Gerardo A. in October 2024

    LD
    La Verne, CA·

    Renovation with Elegance and Value, Pergolas, Kitchen & Bathroom Remodel , and 1 more

    "We had several contractors give us estimates and Ani of LGC was the best. She was knowledgeable, professional and not pushy at all. My husband and I felt very comfortable with her and it didnâ t take us long to choose her. She helped with the design, locating materials and also helped us save money. The workers arrived on time, put in a full dayâ s work and did an amazing job for us. What started as a primary bathroom remodel turned into primary bedroom, bathroom and master closet redo, flooring to most of our house and two patio redos. We felt comfortable with the entire process from start to finish. Ani and her crew kept us informed and helped with giving us other options that we didnâ t even think of. In a few weeks they will put in a beam in our family room. Iâ m very excited. The entire crew were very professional, knowledgeable, neat and cleaned up afterwards. We will definitely use them again. We couldnâ t be more happier with the choice we made. It was the RIGHT one."

    Carmen D. in April 2023

Showing 1-9 of 18 results

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

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 Ontario, CA

HomeAdvisor Community Rating

Overall Rating:

Ontario Addition & Remodeling Contractors are rated 4.4 out of 5 based on 187 reviews of 187 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 Ontario, CA

    • Project Location: Ontario, CA
      Date: 02/04/24
      Type of Addition: Detached addition
      Project Description: Design and build
      What types of rooms/spaces are you interested in adding to your home?: Bedroom(s)
      Comment: New home need another room
    • Project Location: Ontario, CA
      Date: 01/19/24
      Type of Addition: Second story addition
      Project Description: Design and build
      What types of rooms/spaces are you interested in adding to your home?: Living/family room
      What types of rooms/spaces are you interested in adding to your home?: Bedroom(s)
      Comment: I would like to extend my current home by about 200 square feet. 100 square feet on the first floor and 100 square feet on the second floor. The first floor would be an extension of the living room and the second floor would be an extension of the main bedroom. Depending on the cost, I may also be interested in converting the garage as part of the project, but that is not the primary focus.

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