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Addition Contractors in Seattle, WA

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  1. Answer a few questions about your home project.
  2. Within seconds, get matched with top-rated local pros.
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Service Pros

    Giant Builders Seattle LLC Logo

    "Giant builders did an amazing job on my bathroom remodel. I wanted white marbled look and they did not fail too deliver. The workers were extremely meticulous when installing everything and they finished the project on time. I would highly recommend them in the future."

    briahna T. in December 2022

    Homeimprove Construction, Inc. Logo
    Seattle, WA·

    Decks patio enclosures/patio covers, Bathroom & Kitchen remodels, Backyard remodeling landscape/hardscape , and 2 more

    "I hired them for a small bathroom remodel and was blown away by their attention to detail and professionalism. Francisco was a pleasure to work with - he listened to my needs and provided great suggestions throughout the project. The end result exceeded my expectations and I couldnt be happier with the outcome. I highly recommend Francisco and will definitely be using them for future projects."

    Alma K. in June 2023

    PG
    Everett, WA·

    Flooring - Residential and Commercial, Cabinets, Concrete, Decks, Doors, Windows, Floors, Additions & Remodels - Residential and Commercial , and 7 more

    "Carlos is reliable and works with you to make sure you get the end results you envisioned. He installed a new shower and sink faucets. For two bathroom remodels in my house. You canâ t beat the 1 year warranty."

    Olivia G. in February 2024

    Cruver's Contracting, LLC Logo
    Snohomish, WA·

    Cabinets, Flooring, Painting

    "Great people, great work, and things couldn’t have went any smoother. Thank you guys. Would highly recommend to anyone looking to get some renovation done."

    Taylor B. in June 2022

    PC
    Kent, WA·

    Decks, Roofing

    "If you need reliable contractor, my strong recommendation is Palm Construction. I hired them to build a deck and they did phenomenal job. Ray and his brilliant team made this project simple and non painful. I worked with many contractors and this was my best experience. They also charged at the end very reasonable final price, although quality of materials is superb. I can't recommend enough!"

    Colin P. in December 2021

    B

    "Working with BBP was an AWESOME experience. Bradon made our experience comfortable, personal, safe and communication was never an issue. We had a tight time line that Bradon and his crew were able to pull off. I would recommend BBP ð  ¯ for all your remodeling needs."

    Richard T. in February 2024

    Fischer Restoration Logo
    Mountlake Terrace, WA·

    Commercial Bathroom Remodels, Bathroom Remodels, Basement Remodels

    "Andrew Purtee did a top notch job. he went well beyond what was expected to make sure I had a good outcome in a difficult circumstance."

    david G. in November 2020

    TR

    "The team at Pure Home Remodeling did a fantastic job. We have completed two renovations with Pure Home Remodeling and the second one was just recently. They converted our existing master suite to an additional bedroom with walk-in closets, painted the hallway with addition of crown molding and remodeled the patio. In the patio, they did all the hard-scape (fire pit/table and BBQ area). The paperwork from the estimate all the way to the finish of the work, was organized in details and they finished the entire work with a minor delay. Most of the delays happened because there were several issues with the materials that we purchased and they were not in stock. Most project issues that were raised during the work, were handled professionally by our project manager, his team and subcontractors which helped tremendously in solving them quickly and efficiently. We can't be happier with this entire experience with them and mainly with the way this remodeling came out, because we know personally about bad cases where work was not done professionally OR they were abandon in the middle. We are very thankful that our remodeling project went like that."

    Rob G. in December 2018

    EP
    Burien, WA·

    Addition Builds, Deck Builds, Bathroom Remodels , and 1 more

    "Mr. Higley installed a hardwood flooring system throughout the second story of my home. He did an incredible job, paying special attention to the installation and finish carpentry required. It looks amazing!"

    Kirsten D. in February 2024

Showing 1-9 of 43 results

How much do addition contractors typically cost?

  • Seattle, Washington Average
    $54,207
  • Typical Range
    $28,138 - $96,111
  • Low End - High End
    $3,586 - $150,000

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 Seattle, WA

HomeAdvisor Community Rating

Overall Rating:

Seattle Addition & Remodeling Contractors are rated 4.9 out of 5 based on 317 reviews of 317 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 Seattle, WA

    • Project Location: Seattle, WA
      Date: 02/05/24
      Type of Addition: Ground level addition
      Project Description: Design and build
      What types of rooms/spaces are you interested in adding to your home?: Bedroom(s)
      Comment: Customer did not provide additional comments. Please contact the customer to discuss the details of this project.
    • Project Location: Seattle, WA
      Date: 02/03/24
      Type of Addition: Detached addition
      Project Description: Design and build
      What types of rooms/spaces are you interested in adding to your home?: Other
      Comment: Purchasing a house on top of Queen Anne that needs a detached garage. Lot is 40 x 120 ft and there is a back alley. The house is 1980 sqft with a 730 sqft footprint. There is a 2 park gravel parking pad on the back alley side of the lot. I would like to build a 2 car garage with a concrete foundation on the existing parking pad within the limits of a Subject to field Inspection permit. Someday I may want to add a loft to the garage, so it would be ideal to build with this in mind. But for now I just need a place to store cars, motorcycle, bikes etc. and have some space for a workbench.
    • Project Location: Seattle, WA
      Date: 02/02/24
      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
      Comment: Add onto house to make dinning/living room on main floor. Family room/bathroom on ground level. This house has a daylight basement.
    • Project Location: Seattle, WA
      Date: 02/02/24
      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)
      Comment: I want to add a second story onto our 280 sq ft garage. Ideally it would be one large master bathroom.
    • Project Location: Seattle, WA
      Date: 02/01/24
      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)
      What types of rooms/spaces are you interested in adding to your home?: Other
      Comment: lot with permitted project ready to be built! Permits and plans included. Modern 2825 SF well-designed house. 3 bed, 3bath. Plus an additional 2bed, 1bath 810 SF ADU in Basement. Almost an acre property. 2 lots. Water meter on site. Power and Sewer in street for easy connection.
    • Project Location: Seattle, WA
      Date: 02/01/24
      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?: Bedroom(s)
      Comment: Need additional bedroom with toilet n bathroom. Space is bigger than a typical bedroom so I thought there will be space for bath/toilet. This room will be adjacent to the kitchen n facing d backyard. Our house has 1 master bedroom, 3 additional bedrooms, 1 full bath- all bedrooms are upstairs. Downstairs has powder room, kitchen, living room, family room, dining room. Hope this helps. Thank you
    • Project Location: Seattle, WA
      Date: 01/31/24
      Type of Addition: Second story 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: Seattle, WA
      Date: 01/31/24
      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?: Other
      Comment: Customer did not provide additional comments. Please contact the customer to discuss the details of this project.
    • Project Location: Seattle, WA
      Date: 01/29/24
      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: I have a low ceiling basement that I would like to add a bathroom to. The likely location is where the water heater storage tank is located.
    • Project Location: Seattle, WA
      Date: 01/29/24
      Desired Completion Date: Timing is flexible
      Request Stage: Planning & Budgeting
      Project Description: Design and build
      Comment: Customer did not provide additional comments. Please contact the customer to discuss the details of this project.
    • Project Location: Seattle, WA
      Date: 01/26/24
      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: Adding two story additional room to the back of existing house.
    • Project Location: Seattle, WA
      Date: 01/26/24
      Type of Addition: Second story 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: Customer did not provide additional comments. Please contact the customer to discuss the details of this project.
    • Project Location: Seattle, WA
      Date: 01/24/24
      Type of Addition: Second story 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: I wish to add a modest bedroom and bath to a 1909 Bungalow. Stair would rise over existing stair between main and basement. Electric and plumbing have been updated. Bathroom would be added over main floor bath. Anticipate ~ 450 square feet total. I would like to handle interior paint and trim.
    • Project Location: Seattle, WA
      Date: 01/24/24
      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: Basic need for plans & build: Looking to add a small three-quarter bathroom to a finished basement. I need help designing a space efficient plan to convert/reconfigure current laundry room into small bathroom with walk- in shower. I’d like to consider how to utilize the space under the basement stairs [leading to laundry room], which is currently an unfinished closet that houses the plumbing stack. Flexible on scope of project: Additionally, there is ground floor square footage on the back of the house, that could be of potential use if laundry/mudroom need to be relocated or added. A contractor with project design and local coding knowledge would be helpful, for possibly expanding the scope of the project. Or to plan with any future renovations in mind. Ideal collaboration: I’m looking to be cost effective and possibly reuse existing cabinets and possibly source discounted or salvaged materials. Anyone that is creative with parts and materials, would be ideal. Ideally, someone that can maximize function with limited space.
    • Project Location: Seattle, WA
      Date: 01/24/24
      Desired Completion Date: Timing is flexible
      Project Description: Design and build
      Request Stage: Planning & Budgeting
      Comment: Customer did not provide additional comments. Please contact the customer to discuss the details of this project.
    • Project Location: Seattle, WA
      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?: Living/family room
      Comment: Looking to add about a 10x10 (100 sq ft) addition to my house. Two of four walls are already built and form the exterior of the home. Am interested in adding a deck for entertaining on top of the new addition. Am interested in ballpark costs to complete a project along these lines.
    • Project Location: Seattle, WA
      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?: Bedroom(s)
      Comment: Make the existed bedrooms become bigger and build one more bathroom
    • Project Location: Seattle, WA
      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?: 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: Build Additional small House in the back of existing house .

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