Compare Quotes from Addition Contractors
Get Quotes Now

Addition Contractors in Walnut Creek, 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

    "It was a great pleasure working with Omer from GPI Builders on my master bathroom renovation project. Omer plan my project to ensure that I gat the best possible design for my bathroom. He guided me through the selection process of light fixtures, tiles, and paint colors. Omer was a great project manager and managed the workers to make sure the workmanship was up to high standards. I am very happy with the work and the results!"

    venessa A. in December 2021

    JOHN E MUSANTE CONTRACTING Logo
    VALLEY SPRINGS, CA·

    Additions and Remodels, General Contracting

    "We hired John for 2 bathroom remodels, stairwell refresh, and entire interior house painting. John and his team were WONDERFUL to work with! Crew showed up on time and were very skilled, professional, polite and cleaned up at the end of the day. John was incredibly helpful! He recommended a flooring company and prevented me from making a horrible choice in flooring! John is extremely professional, but also very personable. He understood I need a certain amount of hand holding and guided me toward a design I can live with for the next 25 years. He was great with communication and was willing to work his schedule to accommodate ours. He is pricing is fair and reasonable. I would recommend John E Musante Contracting to anyone and will definitely use him for any future work."

    Maria S. in October 2024

    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

    MD
    Oakland, CA·

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

    "I am extremely satisfied and impressed with the construction work done by this company MDT Cinstruction. From start to finish, they demonstrated professionalism, efficiency, and exceptional craftsmanship. They paid attention to every detail and ensured that the project was completed within the agreed timeline. The team was knowledgeable, reliable, and easy to communicate with. The end result exceeded my expectations, and I highly recommend this construction company to anyone in need of quality workmanship."

    Carlos O. in July 2024

    Step Up Construction Logo
    San Jose, CA·

    General Contractor

    "Gabriel and his team did a Fantastic job.!!!"

    angel F. in November 2024

    Cerletti & Kennedy Design-Build Logo
    Walnut Creek, CA·

    Second story additions, no job to big for our in house design and engineering team, Kitchen and Bathroom. Remodel to redesign, give us a call we do it all!, Room additions and remodels, dust free and family friendly, no need to move , and 7 more

    "Matt and Robert were easy to work with, responsive, and very accommodating. Project came in under budget and on time. The crew was great. Would definitely hire again."

    Joe Z. in November 2020

    Hagenbach Construction Logo
    Brentwood, CA·

    Additions to Existing Structure, Custom Home Builder, Kitchen - Remodel

    "I hired Hagenbach Construction based on a referral from my cabinet vanity vendor who I've done business with 4 years prior. John, his wife Amy, and his crew were AWESOME and the finished bathrooms can easily make an HGTV remodel or magazine feature. They were far better than I ever imagined. I wish I can post some photos here, but hopefully, the finished bathrooms will grace his website. My project involved two bathroom remodels - a master and guest (and the only two in my single story home) over a period of 7-8 weeks. The master bathroom was a total demo of the existing 200 sq. ft. space, on a slab floor and what we believed had post tension cables. It was a complex project, in my opinion, and one I waited on the right contractor to help me with. John was meticulous in the planning of the work, review of my design, and in every aspect of the tricky construction. While I had an initial design from the cabinet vendor, John validated the measurements, size of vanity, walk-in shower, shower seat and niches, placement of the freestanding tub, canned lights and wall sconces, vents, the new pocket door and bathroom door, etc.. The floor tiles and shower tile accent were very intricate, utilizing basketweave floor tiles and a herringbone shower tile accent. They were installed perfectly. John personally laid the shower tile accent on a piece of plywood for me to see and finalize before installation. The wall and placement of the carrara marble subway tiles and chair rails were also carefully planned across the room, so that he can plan for where the cut pieces were going to be. On the 6' x 6' walk-in shower, he assisted in getting me the best neo-angle configuration, with the best 30" door placement. He also guided me in the options for best hot water availability. There is nothing I would change in these bathroom projects and John and his crew were hardworking, meticulous, conscientious about the remodel inconvenience and were always a pleasure to work with. They always showed up early or when they said they would. I would recommend John and Hagenbach Construction to anyone for any project. Contractors like him are a gem, and few and far between. It shows that he and his crew take pride in their work."

    Brenda S. in November 2016

    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

    MV Builder Logo
    Oakland, CA·

    Remodels & Renovations

    "He's a great guy and does great work!"

    Chris X. in July 2017

Showing 1-9 of 31 results

How much do addition contractors typically cost?

  • Walnut Creek, California Average
    $98,346
  • Typical Range
    $39,890 - $67,500
  • Low End - High End
    $5,800 - $300,000

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 Walnut Creek, CA

HomeAdvisor Community Rating

Overall Rating:

Walnut Creek Addition & Remodeling Contractors are rated 4.8 out of 5 based on 276 reviews of 276 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 Walnut Creek, 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 Walnut Creek, CA

    • Project Location: Walnut Creek, CA
      Date: 01/21/24
      Type of Addition: Ground level addition
      Project Description: Design and build
      What types of rooms/spaces are you interested in adding to your home?: Other
      Comment: Need to add an office and additional space to our 1 story 1400sqft home. Plenty of land to build on. Need ideas on where we would build. Potential to partially build into our 3 car garage and add an addition to the side of the garage
    • Project Location: Walnut Creek, CA
      Date: 01/14/24
      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?: Living/family room
      What 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.

    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.