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
Compare Quotes from Addition Contractors
Get Quotes NowAddition Contractors in Portland, OR
Where do you need Build an Addition pros?
How It Works
- Answer a few questions about your home project.
- Within seconds, get matched with top-rated local pros.
- Compare quotes and choose the best pro for the job.
Service Pros
Salem, OR·
Interior and Exterior Residential and Commercial Door Install, Wood or Fiber - Cement Siding Install or Completely Replace, New Window Install for Home and Business , and 1 more
"Paul replaced all of the interior doors in our home. He does quality work and is a pleasure to have in our home."
John S. in November 2017
Battle Ground, WA·
Concrete Repairs, Home Service Repairs
"I have been waiting for a patio for years and I was hesitant on who to help me make it happen. I couldnâ t have asked for a better company. Tyson is honest and hardworking and always called and checked in with me . He shows up to make sure everything is prepped and ready for cement trucks. He was amazing at knowing how much was needed.His quotes were almost right on. I did not have to be home for him to be there . He even helped me with a beautiful rounded patio step. Iâ m using him for all my next projects. He is amazing. If I could give more than 5 stars I would."
Misty S. in November 2022
Portland, OR·
Carpenters
"Mike and his crew did an amazing job on our basement. Not only did they finish the project ahead of schedule, they also helped replace parts of our stairs at no extra cost and were extremely flexible and easy to work with throughout the project. If I ever have any other major home remodels or framing needs, or friends/family that need the same, I am for sure going to start with MSW as a top tier option!!"
Spencer G. in November 2021
MD
Portland, OR·
Decks and fences, ADU design and construction, Additions and Remodels , and 2 more
"We started with one project with Mass Design, and were so pleased with their work that we added two additional home improvements as well. They truly care for their clients and go above and beyond when working to meet their needs. My wife and I found it surprising how carefully they listen. Things mentioned as a passing comment were noted and acted on. Their workmanship and design skills were exceptional, their communication clear and concise, and we were never left in question about any step of the process. In addition, we truly appreciated their honesty and transparency. Simply put, fantastic to work with. I would highly recommend using their services and we have more projects down the line where we will be using them."
Kerry L. in September 2023
JB
North Plains, OR·
x
"Jay & his crew were wonderful. It was nice to have such a pleasant & professional group at our house. The work was great and Jay was very helpful in his recommendations for our house painting project."
Laura R. in October 2011
GC
Vancouver, WA·
Decks, Bathroom Remodels
"We needed our deck redone so it is all one level and a new patio/deck cover installed. This was not an easy task because they had to raise portions of the deck and run the boards in one direction. All of this with using only the existing decking. They did an amazing job and the deck is actually more solid now than before. They did everything we asked of them and then some. The patio/deck cover is top notch. It is a 16 foot by 30 foot cover so it is not something small. They used joist hangers and hurricane braces so this cover/awning will never move. There are a lot of words there to say that we would absolutely hire this company again. The whole crew is professional, experienced and customer friendly. Amazing work. Thank you."
Mike S. in November 2023
West Linn, OR·
Salem, OR·
Home Improvement, Home Improvement, Drywall , and 4 more
"They were very easy to work with and very kind I got exactly what I asked for. They pay close attention to detail. Theyâ  re very clean and thorough! They do everything to please the client"
Luis S. in June 2023
FD
Beaverton, OR·
"Ty is very talented! He has done a few projects for our home and we are always very happy with his work!"
Kelly M. in February 2023
Showing 10-18 of 31 results
Costs for related projects in Portland, OR
- Build a Barn, Shed or Playhouse$1,350 - $5,000
- Build an Addition$19,241 - $69,327
- Demo an Interior$2,407 - $8,433
- Perform Home Renovations and Repairs$3,536 - $20,850
- Remodel or Renovate a House$17,732 - $82,222
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.
Other Top Projects in Your Area
Other Cities in Oregon
Find Build an Addition Pros in Portland, OR
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 Recent Leads
Recent Job Requests for Addition & Remodeling Contractors in Portland, OR
Project Location: Portland, OR Date: 02/04/24Type of Addition: Second story additionProject Description: Design and buildWhat 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?: KitchenWhat 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: 02/02/24What types of rooms/spaces are you interested in adding to your home?: Bathroom(s)Type of Addition: Second story additionWhat types of rooms/spaces are you interested in adding to your home?: Bedroom(s)Project Description: Design and buildComment: Customer did not provide additional comments. Please contact the customer to discuss the details of this project.Project Location: Portland, OR Date: 01/31/24Type of Addition: Ground level additionWhat types of rooms/spaces are you interested in adding to your home?: Bathroom(s)Project Description: Build - use existing architectural drawingsWhat 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: 01/30/24Type of Addition: Ground level additionProject Description: Design and buildWhat 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: 01/29/24Type of Addition: Second story additionWhat types of rooms/spaces are you interested in adding to your home?: Bathroom(s)Project Description: Design and buildWhat 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: 01/28/24Type of Addition: Ground level additionProject Description: Design and buildWhat types of rooms/spaces are you interested in adding to your home?: Bedroom(s)Project Location: Portland, OR Date: 01/27/24Type of Addition: Detached additionProject Description: Design and buildWhat types of rooms/spaces are you interested in adding to your home?: OtherComment: Looking to have 2 car detached garage built, possibly with apartment above.Project Location: Portland, OR Date: 01/27/24Reason for Cable: 1Type of Addition: Ground level additionProject Description: Design and buildWhat types of rooms/spaces are you interested in adding to your home?: KitchenComment: Customer did not provide additional comments. Please contact the customer to discuss the details of this project.Project Location: Portland, OR Date: 01/25/24Type of Addition: Ground level additionProject Description: Design and buildWhat types of rooms/spaces are you interested in adding to your home?: OtherComment: Tree damage to a 20’x 20’x10’ room extension off detached GarageProject Location: Portland, OR Date: 01/23/24Desired Completion Date: Timing is flexibleRequest Stage: Ready to HireRequires Work on Historical Structure: NoRequest for Commercial Location: NoProject Description: Build - Use existing architectural drawingsRooms Included:: Living/Family roomRooms Included:: BathroomWhat type of guest house/casita addition will this be?: Remodel existing spaceComment: Converting detached garage to bathroom/living areaProject Location: Portland, OR Date: 01/23/24Project Description: Design and buildType of Addition: Ground level additionWhat types of rooms/spaces are you interested in adding to your home?: OtherComment: Customer did not provide additional comments. Please contact the customer to discuss the details of this project.Project Location: Portland, OR Date: 01/22/24Type of Addition: Detached additionProject Description: Build - use existing architectural drawingsWhat types of rooms/spaces are you interested in adding to your home?: OtherComment: Would like to turn a garage into an adu. New roof needed as well as one new wall.Project Location: Portland, OR Date: 01/22/24Type of Addition: Convert or finish existing spaceProject Description: Design and buildWhat 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?: KitchenWhat types of rooms/spaces are you interested in adding to your home?: Living/family roomWhat 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 aduProject Location: Portland, OR Date: 01/21/24Type of Addition: Convert or finish existing spaceProject Description: Design and buildWhat 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: 01/20/24Type of Addition: Second story additionProject Description: Build - use existing architectural drawingsWhat 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?: KitchenWhat types of rooms/spaces are you interested in adding to your home?: Living/family roomWhat 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?: OtherComment: 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: 01/19/24Type of Addition: Ground level additionProject Description: Design and buildWhat 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: 01/16/24Project Description: Design and buildType of Addition: Ground level additionWhat 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?: KitchenWhat 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 roomComment: Customer did not provide additional comments. Please contact the customer to discuss the details of this project.
