Compare Quotes from Addition Contractors
Get Quotes Now

Addition Contractors in Berkeley, CA

Where do you need Build an Addition pros?

How It Works

  1. Answer a few questions about your home project.
  2. Within seconds, get matched with top-rated local pros.
  3. Compare quotes and choose the best pro for the job.

Service Pros

    GB
    Walnut Creek, CA·

    Concrete and Masonry, Decks and Railings, Additions and Remodels , and 1 more

    "Me and my husband looking for contractors, after long research we found GPI Builders and they provide the best service. We did remodeling to our bathroom and master bedroom. They also gave us a great design! The crew pay attention to every details + responsive very quickly to any issue we had. Thanks!!!"

    Jennifer G. in December 2021

    RC
    Tracy, CA·

    "He did a great job. Great customer service and he used good materials. My mother-in-law loved his job. Perfect pricing."

    Masoud M. in October 2021

    Treasure Construction Logo
    Pinole, CA·

    Additions and ADUs, Earthquake Retrofitting, Bathroom Remodels , and 2 more

    "These guys really know what they are doing! Robert, the boss, is fabulous."

    Dianne S. in November 2024

    MD
    Oakland, CA·

    Home Remodeling and Renovation, Additions and Extensions, Custom Design and Construction , and 2 more

    "Liliana does an incredible job with remodels and I have always liked her elegant, unique style. I definitely recommend her."

    Victoria S. in August 2024

    SI
    Hayward, CA·

    Handyman and much more!

    "The team was amazing! We had an old deck in our backyard and we hired Palm Construction to replace and extend it and they did a great work! The job was done in less than 2 weeks, Communication was great, they cared about the backyard and plants and we are so happy itâ s all ready just before summer. Highly recommended!!"

    yael H. in May 2024

    UC
    Emeryville, CA·

    "Updating our home was a dream we have had for years. But finding a good contractor in Bay Area was so difficult, that we almost gave up. We were introduced to United C Construction by our architect(who we also love!) It was exhausting trying to find someone trustworthy and not overpriced. We had luck of working with Osmar which during the project we had clear communication, expectation of setting, professionalism and superior craftsmanship. He walked us through every step of the way, and helped problem solve tough permitting and structural issues in Berkeley!"

    Shelby R. in September 2024

    Robertson Renovations Logo
    Walnut Creek, CA·

    Additions and Remodels

    "A great contractor, shows up on time and really accurate with the pricing."

    patty P. in December 2021

    EA Home Builders, Inc. Logo
    Concord, CA·

    "They are very reliable and punctual. Very communicative with the customer so that they know what to do and that the customer gets what they want. Very good service."

    Todd R. in October 2024

    SC
    Dublin, CA·

    "I had a great experience with my guest house from SmartBuild, they did everything on time and with quality, the workers were also professional. I would highly recommend doing your project with them!"

    Val H. in July 2024

Showing 1-9 of 33 results

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 Berkeley, CA

HomeAdvisor Community Rating

Overall Rating:

Berkeley Addition & Remodeling Contractors are rated 4.7 out of 5 based on 183 reviews of 183 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.


Other Top Projects in Your Area

Other Cities in California

If you're looking for Build an Addition Contractors that serve a different city in California, here are some popular suggestions:

Find Build an Addition Pros in Berkeley, CA

HomeAdvisor: The nation's largest network of screened and rated pros.

Tell us about your project and we'll match you to the perfect pros.

Get Matched With Pros

Find Pros Nearby


Things to Consider Before You Build an Addition:

What best describes this project?

    Do you provide these professional services?

    Find out how HomeAdvisor can help your business

    See Local Demand

    See Recent Leads

    Recent Job Requests for Addition & Remodeling Contractors in Berkeley, CA

    • Project Location: Berkeley, CA
      Date: 02/02/24
      Type of Addition: Convert or finish existing space
      Project Description: Design and build
      What types of rooms/spaces are you interested in adding to your home?: Bathroom(s)
      Comment: Space is below grade level and will require a sump pump for plumbing of bathroom. Desire a small bathroom, no tub. Prefer universal design. Bathroom should be about 5x7, and placed in what is now large, empty room with concrete floor. Walls of room were removed for mold remediation, and need to be restored.
    • Project Location: Berkeley, CA
      Date: 01/29/24
      Type of Addition: Ground level addition
      Project Description: Design and build
      What 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 Location: Berkeley, CA
      Date: 01/26/24
      Type of Addition: Ground level addition
      Project Description: Build - use existing architectural drawings
      What 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?: Kitchen
      What types of rooms/spaces are you interested in adding to your home?: Bedroom(s)
      Comment: We live in a 2/1 865sf home at 1537 Cedar St, Berkeley, CA 94703. It is a single story bungalow on a flat lot. We're planning to add an additional 548sf with an enlarged kitchen and new master suite. We've just finished structural planning and are submitting to the city. Cntact me for attached plans. I'm hoping to find a contractor with experience on craftsman homes, who can start work in the next few months. Please let me know if this project is interesting for you and your team, and whether you'd like to discuss further, and if not, whether you have other contractors you might recommend. Looking forward to connecting with you!

    References Available
    Tell us your zip code to view pricing & schedule
    Tell us your location to view pricing & schedule
    Choose your project to view pricing & schedule

    Please enter valid zip.

    Please choose a location.

    We're sorry but the time you have chosen is no longer available.
    Please select a new time below:
    does not provide service to View pros who serve this zip
    Enter a zip code to view which pros serve this zip.
    There was an issue connecting to the server. Please try again or call Customer Service at 1-888-811-ANGI.
    We're sorry but the time you have chosen is no longer available.
    Please select a new time below:

    Select your appointment type and time:

    Final Step - Confirm Your Appointment:

    Confirm your appointment with on , - Change


    Required
    Required
    Required
    Required
     
     
     

    By clicking Confirm Appointment, you affirm you have read and agree to the HomeAdvisor Terms & Conditions, and you agree and authorize HomeAdvisor and its affiliates, and their networks of Service Professionals, to deliver marketing calls or texts using automated technology to the number you provided above regarding your project and other home services offers. Consent is not a condition of purchase.