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Addition Contractors in Portland, OR

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Service Pros

    DG
    hillsboro, OR·

    "He is great at taking a vision and turning it into reality! He sees what could be!"

    John C. in May 2020

    F.J.S. Construction Logo
    Portland, OR·

    ADUs, Garage Remodels, Personal Sheds , and 1 more

    "F.J.S. Construction was easy to work with, very helpful in every step of the way. We love our beautiful new space, and I appreciate how they ran according to schedule and the attention to detail they took."

    Krystal S. in March 2023

    MC
    Portland, OR·

    Windows, Doors, Basement Remodel

    "Explains everything. I would give him a ten if I could! He is the best priced and does the best work!"

    Lisa S. in September 2014

    Performance Renovations, LLC Logo
    Sherwood, OR·

    Dry Rot - Repair/Renovations, Additions and Remodel, Siding - repair/replace/install

    "Ryan and his team was friendly and engaged from day one. Our project was small, but we got their full attention. The project got done quickly and the few additional items we needed we done at the right cost. Overall - excellent work form a great, professional team."

    Adam S. in May 2017

    MC

    In business since 2022

    Portland, OR·

    Residential & Commercial, Licensed & Insured, Home Improvement Contractor , and 1 more

    About us: "We are a locally owned and operated company that values honesty and integrity and treats your home as if it were our own. We offer a variety of General Contractor services that are customizable to each individual project. You will find us to be competitively priced, paying close attention to the details of each and every project that we are involved with. We look forward to building lasting relationships and guarantee your satisfaction!"

    BN

    In business since 2016

    Milwaukie, OR·

    Decks, Remodels, Excavation , and 4 more

    About us: "Bigfoot NW Construction LLC is an experienced full service Residential General Contractor serving the Greater Portland area. We are a small motivated crew with thousands of hours of experience with many unique and challenging projects in all aspects of Construction, Home Improvement, Remodeling and Property Services. We offer three distinct divisions; Design, Build and Dig. Each division specializing in the Design of a space or property, the build or remodel of the property or home and finally the Dig, hardscape and outdoor living space of your property and home. We offer very competitive pricing, attention to detail and understand every project is unique with your satisfaction as our number one goal."

    Millenium Builders Logo
    Beaverton, OR·

    New construction, Remodels, Additions , and 2 more

    "Phil was very professional and did what I wanted him to do. He was curtious and I would be happy to work with him again."

    CBCB2E157D66C5E5C6FCFDFFD16209698D9F1FD6D010D2AF77A2F8454748BC09 6. in February 2025

    Lumi Construction, LLC Logo
    Newberg, OR·

    Handyman Service, Siding, Minor Repairs. , and 1 more

    "Jesus was able to clean my gutters the same day I called. He was efficient and very polite. Did a great job."

    Kathleen W. in November 2018

    AH

    In business since 2014

    Clackamas, OR·

    Handyman Services

    About us: "We are a locally owned and operated company that values honesty and integrity and treats your home as if it were our own. Our services are customized to the individual project, paying close attention to the details of each project that we're involved with. We pride ourselves on the quality of our work as well as our commitment to outstanding results. We look forward to building lasting relationships and guaranteeing your satisfaction!"

Showing 19-27 of 31 results

How much do addition contractors typically cost?

  • Portland, Oregon Average
    $45,761
  • Typical Range
    $19,241 - $69,327
  • Low End - High End
    $4,500 - $100,000

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 Portland, OR

HomeAdvisor Community Rating

Overall Rating:

Portland Addition & Remodeling Contractors are rated 4.9 out of 5 based on 241 reviews of 241 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 Portland, OR

    • Project Location: Portland, OR
      Date: 02/04/24
      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?: Kitchen
      What types of rooms/spaces are you interested in adding to your home?: Bedroom(s)
      Comment: looking for roughly 800 square foot addition , be bathroom upstairs and master bedroom and new kitchen dining area and bathroom down stairs .
    • Project Location: Portland, OR
      Date: 02/02/24
      What types of rooms/spaces are you interested in adding to your home?: Bathroom(s)
      Type of Addition: Second story addition
      What types of rooms/spaces are you interested in adding to your home?: Bedroom(s)
      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: Portland, OR
      Date: 01/31/24
      Type of Addition: Ground level addition
      What types of rooms/spaces are you interested in adding to your home?: Bathroom(s)
      Project Description: Build - use existing architectural drawings
      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: Portland, OR
      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?: 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: Portland, OR
      Date: 01/29/24
      Type of Addition: Second story addition
      What types of rooms/spaces are you interested in adding to your home?: Bathroom(s)
      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: Portland, OR
      Date: 01/28/24
      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)
    • Project Location: Portland, OR
      Date: 01/27/24
      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: Looking to have 2 car detached garage built, possibly with apartment above.
    • Project Location: Portland, OR
      Date: 01/27/24
      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?: Kitchen
      Comment: Customer did not provide additional comments. Please contact the customer to discuss the details of this project.
    • Project Location: Portland, OR
      Date: 01/25/24
      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: Tree damage to a 20’x 20’x10’ room extension off detached Garage
    • Project Location: Portland, OR
      Date: 01/23/24
      Desired Completion Date: Timing is flexible
      Request Stage: Ready to Hire
      Requires Work on Historical Structure: No
      Request for Commercial Location: No
      Project Description: Build - Use existing architectural drawings
      Rooms Included:: Living/Family room
      Rooms Included:: Bathroom
      What type of guest house/casita addition will this be?: Remodel existing space
      Comment: Converting detached garage to bathroom/living area
    • Project Location: Portland, OR
      Date: 01/23/24
      Project Description: Design and build
      Type of Addition: Ground level addition
      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: Portland, OR
      Date: 01/22/24
      Type of Addition: Detached addition
      Project Description: Build - use existing architectural drawings
      What types of rooms/spaces are you interested in adding to your home?: Other
      Comment: Would like to turn a garage into an adu. New roof needed as well as one new wall.
    • Project Location: Portland, OR
      Date: 01/22/24
      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)
      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 have a larger exterior building on my property. Was considering converting it into an adu
    • Project Location: Portland, OR
      Date: 01/21/24
      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: Customer did not provide additional comments. Please contact the customer to discuss the details of this project.
    • Project Location: Portland, OR
      Date: 01/20/24
      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?: 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: Add a second edition and main floor addition of about 1400 sqft. And reconfiguring existing rooms in existing floor plan To add a master suite.
    • Project Location: Portland, OR
      Date: 01/19/24
      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: Would like to build a room off the back of our garage. Would be approx. 16'x22' with a large closet and one window.
    • Project Location: Portland, OR
      Date: 01/16/24
      Project Description: Design and build
      Type of Addition: Ground level addition
      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?: Kitchen
      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?: Living/family room
      Comment: Customer did not provide additional comments. Please contact the customer to discuss the details of this project.

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