Compare Quotes from Addition Contractors
Get Quotes Now

Addition Contractors in Boulder, CO

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

    Atlas Logo
    Denver, CO·

    SD, DD, and Construction Document Preparation, Construction Management and Administration, Residential Design / Budgeting and Planning , and 1 more

    "Mike is great to work with. I talked to 4 other Companies, he grasped the project quickly and did outstanding work. I hope I can work with Atlas agin soon. For what he charged the Quality was outstanding on my project."

    Joe J. in November 2020

    A2Z Builders Logo
    Denver, CO·

    Bathroom Remodeling, House Remodeling, Basement Remodeling , and 2 more

    "We had a great experience working with A2Z for our home remodel. They converted our main floor into an open floor plan, including removing walls, completely remodeling our kitchen, retiling our fireplace, fixing up our floors, repainting entire interior and exterior of the home, and adding lighting throughout the main level. Everything turned out beautifully. Issac was our project manager and he was very responsive and attentive to our needs, really felt like they wanted us to get want we wanted. The few minor hiccups they fixed immediately and we were very impressed. Even during COVID, project stayed on time and on budget, which we were very happy about. We do wish the designer was a little more involved in planning because we ended up having to make some decisions on our own, but the process was very smooth and the 3D rendering was great to have before committing to the design. We shopped around a bit and A2Z was very competitively priced. Would definitely work with them again."

    Taylor B. in October 2021

    James W. Lyon General Contracting Logo
    Boulder, CO·

    Over 30 years of Remodeling Experience, Additions and Pop Tops, Remodels , and 2 more

    "James was great. Very professional and courteous and his craftsmanship was outstanding."

    Eric M. in December 2018

    Maliakai Architectural Design Logo
    Louisville, CO·

    Architect

    "Marc helped us take an unexpected home disaster and turn it into our current dream home. He was patient with a process that rapidly expanded from a kitchen remodel, due to water damage, to an almost complete tear down. He helped us with selecting Pine Contruction, with whom Marc has an amazing working relationship. This came into play many times as the challenges of in the field changes, city requirements and unexpected delays came up. As they always do! Marc s calm approach and willingness to help is not something you that can be effectively marketed or advertised. You have to live through it to get it. Beyond the top notch work as an architect Marc is just a great person who makes sure his clients can depend on him to be fair and look out for their interests. I highly recommend Marc and his business and we are grateful to be in a MaliaKai Designed home. It s truly beautiful."

    christopher J. in April 2020

    Wes-Tec Builders Company, Inc. Logo
    Denver, CO·

    Detached/Attached Garages, Patio Cover/Patio Enclosures/Carports, Room Additions , and 1 more

    "Westec Builders did such a great job with adding an entertainment room to my house! We had wanted a bar and hang out area and wasnâ t really sure where to start. Robert and Jeff met with me and helped me design what worked best to add to our house. They were always on time and professional and really knew how to help with every question I had. With covid, there were unfortunately delays, and they handled it all perfectly and kept in communication with me the whole time. My bar and room addition came out so beautifully, I will be using them for any future projects I have."

    Danielle S. in November 2020

    DD

    "Didactic Design completed a partial basement finish design that included 2 bedrooms and a bathroom. The communication I received was professional and timely and the design was exactly what we needed."

    Ryan B. in June 2023

    RA
    Broomfield, CO·

    Building Design, Architect, Kitchen Design , and 1 more

    "Still working with Doug on my ADU plans but so far I'm very happy with the work he's done."

    Genevieve G. in February 2022

    BC
    Longmont, CO·

    Decks, Porches, and Gazebos, Roofs, Gutters, and Siding, Kitchen and Bath Remodel , and 2 more

    "I hired them to replace the railings along two second-floor decks. They did an excellent job, installing redwood railings with powdered-aluminum balusters and staining the redwood. They ran into a snag on one deck, because the boards underneath the railing had rotted from water damage, but they quickly repaired the frame and subcontracted the stucco repair as well as metal caps to prevent the wood from getting damaged again. Their whole crew is very polite and considerate of the residents and did not disrupt our lives any more than necessary. The owner, Brian Gorton, is a young fellow but is a good businessman and is very good at explaining the options. I enjoyed working with him and his crew."

    Allen S. in October 2014

    Decisive Architectural Design Solutions Logo
    Westminster, CO·

    Kitchen Remodel - Design to Build

    "This was our first time remodeling a house and Kelle made it an outstanding experience. He guided us through every detail and truly built us our dream home. He was upfront on all costs and any potential issues. He managed the project within budget and was right on time. I would certainly recommend Hire DADS to everyone."

    Warren R. in April 2014

Showing 1-9 of 21 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 Boulder, CO

HomeAdvisor Community Rating

Overall Rating:

Boulder Addition & Remodeling Contractors are rated 4.8 out of 5 based on 223 reviews of 223 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 Colorado

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

Find Build an Addition Pros in Boulder, CO

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?

    What kind of addition do you want?

      Select the rooms included in this project:

      • Bathroom
      • Kitchen
      • Bedroom(s)
      • Garage/Workshop
      • Living/Family room
      • Laundry/Mud room
      • Deck/Porch
      • Basement
      • Office(s)
      • Common area(s)

      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 Boulder, CO

      • Project Location: Boulder, CO
        Date: 06/08/23
        Desired Completion Date: Less than 2 months
        Request Stage: Planning & Budgeting
        Project Description: Design and build
      • Project Location: Boulder, CO
        Date: 06/06/23
        Desired Completion Date: More than 2 months
        Request Stage: Ready to Hire
        Type of Addition: Second story addition
        Requires Work on Historical Structure: No
        Request for Commercial Location: No
        Project Description: Build - Use existing architectural drawings
        Rooms Included:: Kitchen
        Rooms Included:: Bedroom(s)
        Rooms Included:: Living/Family room
        Rooms Included:: Bathroom
        Rooms Included:: Deck/Porch
      • Project Location: Boulder, CO
        Date: 06/01/23
        Desired Completion Date: Timing is flexible
        Request Stage: Planning & Budgeting
        Project Description: Design and build
        Comment: Small first floor addition and bathroom
      • Project Location: Boulder, CO
        Date: 05/28/23
        Desired Completion Date: More than 2 months
        Request Stage: Planning & Budgeting
        Project Description: Design and build
        Comment: We’re just trying to understand the costs associated with adding a second story. Timing is flexible

      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.