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Addition Contractors in Saint Louis, MO

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  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

    MR
    Ballwin, MO·

    Basment finishing, Furnace & A/C Repair

    "Jacob and Cody have been amazing to work with. We originally hired them to repair our stairs and have since contracted with them to install our kitchen tile floor, install electric in our kitchen island and to repair some of our drywall. Their team is very professional, their estimates are accurate and they do quality work. We plan to hire them again when we remodel our bathrooms."

    Jodi B. in November 2020

    Invested Home Renovations Logo
    Saint Louis, MO·

    INVESTED HOME RENOVATIONS specializes in basements, kitchens, bathrooms, showers, flooring, staircases, base board, doors & other trim carpentry.

    "Overall good experience. Worked directly with the General Contractor, he was able to work around my schedule and ensure that all subs completed their work to our standard the first time! Upfront pricing, honest and provided flexibility in price. For example, I wanted to have my own painter. Additionally I purchased my own vanity and shower. He provided just a labor quote. Iâ ve already recommended to two friends!"

    Tony H. in December 2022

    Swenson Builders LLC Logo

    In business since 2022

    Harrisonville, MO·

    M - F 8am - 5pm

    About us: "Here at Swenson Builders LLC we are family owned & operated with over 17 years of experience. We take great pride in our expertise, quality, and customer service that we provide to meet the consumer's needs. It is our mission to provide excellent workmanship and complete customer satisfaction, from the start to completion of a project. In order to understand the needs and expectations of our customers, we take great care to work and communicate with every client in a professional manner. Our reputation is based on service, safety, and quality, regardless of how large or small the job we will treat your home as we would treat our own. Give Swenson Builders LLC a call today, We look forward to working with you!"

    NC
    Saint Louis, MO·

    Addition to Existing Structure Residetial or Commercial, Basements, Batrooms, Kitchens, Garages

    "Easy to work with and high quality of work."

    Allison D. in June 2019

    AC
    Belleville, IL·

    Fencing, Porches, Patios, Landscaping

    "They did a fantastic job."

    JR O. in December 2017

    PC
    St Louis, MO·

    Custom Cabinets, Remodeling, Additions

    "I am a business owner who was searching for a reputable construction company that could build out a kitchen and bathroom along with cutting-in and installing two new, exterior windows to our office space. This project had a fair amount of urgency to it and the difficult part is we weren't going to stop meeting with our clients during the renovation so we were going to need to work around noise levels, etc. Thankfully HomeAdvisor connected me with Pernikoff Construction Company as I can't say enough good things about them! They were professional, timely, organized and incredibly pleasant to work with. They kept the lines of communication open at all times and every single person they sent out to work on our job were gracious and knowledgeable professionals. They each had their little specialities they were there to work on and every single one of them worked with us to keep the noise to a minimum when we had in-house client meetings. All-in-all, I am so happy and relieved that HomeAdvisor was able to connect me to Pernikoff as I really could not have asked for a better construction company to complete my office renovation. I would highly recommend them for any project that you will want completed in a timely and professional manner!"

    Mark S. in April 2020

    Weaver Commercial & Home Improvements, LLC Logo
    Wentzville, MO·

    Kitchen - Remodel, Basement - Remodel, Major Home Repairs (General Contractor) , and 1 more

    "Scott and all of his crew were very professional and friendly, they also got the job done in a timely manner. I would absolutely recommend them and would use them for another project"

    Melissa D. in December 2017

    R
    Saint Louis, MO·

    Insulations Bat and Rolled only, Additions & Remodels, Complete Construction , and 4 more

    "Quick responses and make you feel like the most important project that day. Great skill and value"

    Allison K. in December 2023

    MO Docks, LLC Logo
    Lake St Louis, MO·

    Decks, Docks

    "Missouri Docks & Decks are an exceptional deck building company. They have a quality product and service and communicate with you every step of the way from their free estimate to material costs and realistic timelines. You are in great hands with them and I highly recommend them!"

    Julia A. in October 2023

Showing 1-9 of 11 results

How much do addition contractors typically cost?

  • Saint Louis, Missouri Average
    $49,598
  • Typical Range
    $29,790 - $75,000
  • Low End - High End
    $10,000 - $90,000

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 Saint Louis, MO

HomeAdvisor Community Rating

Overall Rating:

Saint Louis Addition & Remodeling Contractors are rated 4.8 out of 5 based on 141 reviews of 141 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 Saint Louis, MO

    • Project Location: Saint Louis, MO
      Date: 02/04/24
      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)
      Comment: Customer did not provide additional comments. Please contact the customer to discuss the details of this project.
    • Project Location: Saint Louis, MO
      Date: 02/03/24
      Type of Addition: Ground level addition
      Desired Completion Date: Timing is flexible
      Project Description: Design and build
      Rooms Included:: Bathroom
      Comment: addition to existing structure build
    • Project Location: Saint Louis, MO
      Date: 02/02/24
      Project Description: Build - use existing architectural drawings
      Type of Addition: Convert or finish existing space
      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.
    • Project Location: Saint Louis, MO
      Date: 02/01/24
      Type of Addition: Ground level addition
      What types of rooms/spaces are you interested in adding to your home?: Living/family room
      Project Description: Build - use existing architectural drawings
      Comment: I would like to get an estimate for Build an Addition. Would like to expand entry way about 1 foot (estimated would require a professional to be for certain)
    • Project Location: Saint Louis, MO
      Date: 01/30/24
      Type of Addition: Ground level addition
      Project Description: Design and build
      What types of rooms/spaces are you interested in adding to your home?: 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: i need a add on 10x20 make the liven room bigger and the kitchen bigger plus the master bedroom bigger with a walk in shower
    • Project Location: Saint Louis, MO
      Date: 01/30/24
      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?: Bedroom(s)
      Comment: Customer did not provide additional comments. Please contact the customer to discuss the details of this project.
    • Project Location: Saint Louis, MO
      Date: 01/29/24
      What type of project do you need done?: Build/install addition to existing structure
      Comment: Replace a concrete slab
    • Project Location: Saint Louis, MO
      Date: 01/29/24
      Type of Addition: Second story addition
      Project Description: Design and build
      What types of rooms/spaces are you interested in adding to your home?: Bathroom(s)
      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.
    • Project Location: Saint Louis, MO
      Date: 01/27/24
      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?: Living/family room
      Comment: I need to strip and gut the roof of the 2 & 1/2 car garage on the alley at the rear of my property. then build a supporting frame/structure and floor for a metal building to be placed on the structure. The existing garage is a brick wall (2 course 6" thick) structure. Outside dimensions are 25'w x 20'd. The inside frame (and floor) will be 24'w x 20'd. consisting of 6"x6" posts and 2"x6" joists, with a steel beam in the middle of the 20' length to support the joists. Floor will be plywood and MDF. Some brickwork will need to be altered to fit the metal structure fitting within it. And a deck/stairs will need to be constructed to access the second story entrance front the courtyard. Once installed, the metal building will be insulated and clad with (to be decided), overlappimg the lower brick walls.
    • Project Location: Saint Louis, MO
      Date: 01/23/24
      What room(s)/space(s) are you interested in adding to your home?: Living/family room
      What kind of addition do you want?: Ground level addition
      What best describes this home addition project?: Build from existing designs
      Comment: Would like to expand entry way about 1 foot (estimated would require a professional to be for certain)
    • Project Location: Saint Louis, MO
      Date: 01/22/24
      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)
      Comment: Customer did not provide additional comments. Please contact the customer to discuss the details of this project.
    • Project Location: Saint Louis, MO
      Date: 01/22/24
      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?: Bedroom(s)
      Comment: thinking about building a master suite
    • Project Location: Saint Louis, MO
      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?: 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: We would like to expand our one bedroom home. We want to expand the bedroom to create a larger bedroom with en suite bath and walk in closet. We want to open the kitchen wall and add an island, and new countertops. We want to add a bedroom and family room.
    • Project Location: Saint Louis, MO
      Date: 01/20/24
      Type of Addition: Ground level addition
      Project Description: Design and build
      What types of rooms/spaces are you interested in adding to your home?: Kitchen
      What types of rooms/spaces are you interested in adding to your home?: Bedroom(s)
      Comment: we are looking to expand our Kitchen by at least 5ft out over the backyard, and build an additional room (bedroom) that would be attached to the new kitchen and the entrance be from the dinning room. We do not have measurements of either room, it basically depends on the cost.
    • Project Location: Saint Louis, MO
      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?: Bathroom(s)
      What types of rooms/spaces are you interested in adding to your home?: Bedroom(s)
      Comment: Looking to bump out both sides of our second story on our house.
    • Project Location: Saint Louis, MO
      Date: 01/18/24
      Reason for Cable: 1
      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?: 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)
      What types of rooms/spaces are you interested in adding to your home?: Other
      Comment: I am building a brand new duplex in st louis mo And looking for a good . Knowledgeable contractor who built from the ground up
    • Project Location: Saint Louis, MO
      Date: 01/16/24
      Reason for Cable: 1
      Type of Addition: Ground level addition
      Project Description: Design and build
      Comment: Want add a small room addition off kitchen. We want to move washer & gas Dryer from basement to main level in this room addition. Size will be approximately 25’ wide (length of side of house) by approximately 15’ deep. Currently there is a partial overhang roof (a covered porch). Our home is small 850 sq feet Also, would like an estimate to extend part of existing roof at front of house and build a deck under it. Currently there is only a small covered porch at front door.
    • Project Location: Saint Louis, MO
      Date: 01/13/24
      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: Quiero hacer un local para negocio de 2000sqft

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