Top-rated addition to existing structure builders.

Get matched with top addition to existing structure builders in Portland, OR

Enter your zip and get matched with up to 3 pros

Matching on HomeAdvisor

Share some details icon
Share some details about your home project.
Match with local pros icon
Within moments, match with highly-rated local pros.
Compare quotes icon
Compare quotes and choose the best pro for the job.

Find Addition to existing structure builders in Portland

Avatar for Superior Building Concepts LLC
Superior Building Concepts LLC
4.9(
48
)
Addition to Existing Structure - Build

Serving Portland, OR and surrounding areas

Approved

In business since 1999

Free estimates

Warranties offered

"I could tell from the minute Stan Petriyenko of Superior Building Concepts came to give me a bid on my primary bathroom remodel that he was an experienced and knowledgeable professional. He measured carefully, listened to what I hoped to do asking pertinent questions. He also brought up ideas I hadn’t thought of. He provided a thorough and detailed bid. After I accepted the bid he did a fantastic job of keeping me informed on the schedule and this continued throughout the project. I was always informed about what would be happening next on the project and the times he or his subcontractors would arrive. At the start of the remodel Stan met me at the plumbing supply and tile / countertop showrooms and gave me helpful tips and recommendations on products. He next set up dust shielding and floor / carpet protection. The work area and path from the entry door were kept organized and clean throughout. All of the subs used were experienced providing excellent workmanship."
Before
After
After
Before
Before

+8

8 neighbors recently requested a quote
Recommended by97%of homeowners
Avatar for Mt. Tabor Construction
Mt. Tabor Construction
4.7(
83
)
Addition to Existing Structure - Build

Serving Portland, OR and surrounding areas

Approved

In business since 1985

Customers say: Super punctual

"Rob is excellent at what he does, and what he cannot he will let you know instead of "figuring it out". His quote was one of the lower estimates, and you get high quality ethics. Even with all the challenges along the job the final result was exactly as expected, provided with full integrity. We'll definitely hire him for future/ other jobs. It feels like he takes pride in his work to be done right and not just a job to get done quick, to move to next one."
Patio Cover
Bathroom remodel
Fencing
Bedroom Remodel
Built-in Shelving

+2

Response time2 days
Response rate100%
1 neighbors recently requested a quote
Avatar for Rutledge Construction, LLC
Rutledge Construction, LLC
4.9(
36
)
Addition to Existing Structure - Build

Serving Portland, OR and surrounding areas

Approved

In business since 1997

Free estimates

Credit card accepted

"WE LOVE JOSH! We initially hired him to remodel a kitchen after another contractor botched the job. Josh fixed everything and got everything finished the way it should been in the first place! We have since hired him for two more jobs: pouring a concrete driveway extension for RV parking, and replacing some siding and painting the entire exterior of the house. Josh is meticulous and clearly takes pride in his work, he is super easy to work with! I HIGHLY recommend Josh, we will continue to hire him for all of our construction needs!"
Interior finishes
Custom kitchen
Interior finishes
Mango custom cabinets
Robusta floor

+165

Response time1 day
2 neighbors recently requested a quote
Recommended by96%of homeowners
Avatar for Baurer Construction & Flooring
Baurer Construction & Flooring
4.9(
68
)
Addition to Existing Structure - Build

Serving Portland, OR and surrounding areas

Approved

In business since 1987

Emergency services offered

Small jobs welcome

"John and Brian of JAW Construction did a complete interior refresh of our mid 1970’s split entry ranch house. They removed two walls to open up the main living area, added two new windows to allow more natural light in and installed new lighting throughout. All the flooring was replaced with hard wood upstairs and LTV downstairs. They replaced every door along with all the trim in the house. They installed a completely new custom kitchen, remodeled both bathrooms, laundry room and added a wet bar area as well as resurfacing two fireplaces. In short they touched every surface inside our house. John, Brain and all of their subs were easy to work with, professional and helpful throughout the 3 month construction project. They were able to work around the inherent flaws of an older house and were accommodating went we changed our minds and asked for changes. They really did work to fulfill our vision for the house. We are very happy with the fit, finish and overall quality of their work and would highly recommend JAW Construction."
Additional Photos
1 neighbors recently requested a quote
Recommended by100%of homeowners
Avatar for TimelessBuilders
TimelessBuilders
4.9(
14
)
Addition to Existing Structure - Build

Serving Portland, OR and surrounding areas

Approved

In business since 2006

Free estimates

Emergency services offered

"Let me start by saying, this ADU project was for my daughter, Macy. Macy has I/DD and Autism and will likely not be able to live away from us, her parents, unless she is in assisted living of some sort. However, together with her grandma we sought to create an environment for her to live as independently as possible and for her to grow into. This began our search for the perfect contractor who would understand our needs and work with us to build this ADU for Macy. Enter, Jay Bemis with Timeless Builders. After multiple meetings with contractors, many unreturned calls and emails, we met Jay. He immediately sounded interested and returned with a bid in a timely matter. We accepted this bid and began to move forward with this project. As with any construction project, we ran into unexpected situations. I could not have picked a better partner to handle all of these situations. He maintained focus on finding solutions, worked magic to make things happen that we wanted and came up with additional creative ideas when we couldn’t. He is a true craftsman and he employs the most amazing people! The pandemic hit during our project and he was respectful of our request to wear masks when entering our home. They continued the work and Jay was open about end dates and timelines. If you are looking to start a project, I can tell you that Jay Bemis and his team at Timeless Builders is who you want to partner with. Their work exceeded our expectations, their friendliness was an added bonus and the end result blew us away. Don’t think twice, contact Jay with Timeless Builders, he will help you get your project done right."
Additional Photos
Recommended by100%of homeowners
Avatar for Triple D Construction, Inc.
Triple D Construction, Inc.
5.0(
11
)
Addition to Existing Structure - Build

Serving Portland, OR and surrounding areas

Approved

In business since 1993

Free estimates

Credit card accepted

"Great team to work with, quality work, they go out of their way to please the customer. We were doing a living room and front deck expansion project and Paul and his team delivered a beautiful completed project and on budget. I have already recommended Triple D to two other friends for assisting them with their current projects."
Response time9 hrs
Response rate98%
19 neighbors recently requested a quote
Avatar for Clear Water Construction Services
Clear Water Construction Services
5.0(
17
)
Addition to Existing Structure - Build

Serving Portland, OR and surrounding areas

Approved

In business since 2011

Free estimates

Emergency services offered

"I was happy with the crew and the outcome of the project. Very personable and professional company that was able to fit my project in quickly and completed it within a day. Will definitely have them back out for a couple more projects I need to have done."
After 1
After #1
After 2
After #2
After 3

+16

Response time2 days
Response rate100%
Recommended by70%of homeowners
Avatar for Dluxe Construction LLC
Dluxe Construction LLC
4.8(
31
)
Addition to Existing Structure - Build

Serving Portland, OR and surrounding areas

Approved

Super Service Award Winner

In business since 2020

Free estimates

Emergency services offered

"During wind storm a tree fell on out buildings. A garage and 2 sheds. This company was fast in tarping garage roof to keep rain from getting in. Also, Anwar was quick to give estimates on repairing garage roof and sheds. His crews put new roof on garage and sheds as well as replacing broken rafters caused by the tree. They prepped and painted garage and sheds. They look brand new. Anwar interfaced with my insurance company to get additional considerations from the original insurance estimate. I was especially appreciative of his help. You can't go wrong by hiring Dluxe Construction!!!"
Modern Remodeling
Exterior Remodeling
House Remodeling
Exterior Remodeling
House Remodeling

+272

Response time1 day
Response rate98%
56 neighbors recently requested a quote
...
Showing 1-10 of 461
FAQs for addition to existing structure building service projects in Portland, OR

You can typically raise your roof by four to eight feet, depending on your home's structure and roof design. The exact amount depends on factors like roof slope and framing support. Raising the roof creates additional interior space, enhances natural light, and increases your home's value. Consult a professional to determine the feasible height increase for your home.

Yes, you need a building permit to raise your roof. Obtaining a building permit ensures your project complies with local building codes and safety regulations. A professional contractor can assist with the permit and inspection process and ensure all legal and safety requirements are met. Your contractor will be familiar with building codes in your area, which can differ between cities or states.

While it's possible to raise a flat roof, it requires extensive structural modifications. Flat roofs lack the attic space and support structures of pitched roofs, so raising them involves significant engineering to ensure safety and durability. This process can be complex and costly, so professional assessment is essential before undertaking a project of this magnitude.

The Portland, OR homeowners’ guide to addition to existing structure building services

From average costs to expert advice, get all the answers you need to get your job done.