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Top-Rated Addition to existing structure builders in Beaverton - Updated Nov 2026

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

Serving Beaverton, OR and surrounding areas

Approved

In business since 1999

Free estimates

Warranties offered

"Just had our kitchen remodel completed by them and couldn’t be happier! Job was done in the estimated timeframe and on budget. Stan was great to work with. He made great recommendations when we were unsure or stuck on something, and kept us well informed on timing and any issues that came up every step of the way. He and everyone he brought in were very professional and worked hard to get the job done. We are already planning to have more work done by them in the near future. Highly recommend."
Before
After
After
Before
Before

+8

4 neighbors recently requested a quote
Recommended by97%of homeowners
Avatar for Stellar Construction & Remodeling, LLC
Stellar Construction & Remodeling, LLC
4.8(
48
)
Addition to Existing Structure - Build

Serving Beaverton, OR and surrounding areas

Approved

In business since 2008

Free estimates

Emergency services offered

"We hired Steller Construction and Remodeling LLC to build a deck/Catio in May 2024. Micha (the Owner) was straightforward to work with and reach throughout the process. We are retired and live on a set income. Even though we had some lower estimates from other companies, we felt so confident with Micha's (the owner) ideas that, after looking at other reviews/images of this company, we decided to go with Steller Construction. Micha's team was absolutely amazing !!! Ray, our project's lead employee/carpenter, was very knowledgeable, considerate, and had an unbelievable work ethic! The rest of the team did an awesome job as well. They communicated well throughout the whole job always checking in with us to make sure they were doing what we wanted. They were professional and very polite everyday. At the end of each they completely cleaned up the area. We have worked with one other construction company and a roofing company when we did some remodling on our last home and did not have a good experience with either company. We were very nervous about having to go through another bad experience. We were so pleasantly surprised that Steller Construction turned out to be a great decision! Our deck/catio is beautiful and we love it! If you have any construction/remodeling needs contact Micah at Steller ConstructionI you will not be disappointed!"
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+54

Recommended by95%of homeowners
Avatar for Serden Group, LLC
Serden Group, LLC
4.9(
210
)
Addition to Existing Structure - Build

Serving Beaverton, OR and surrounding areas

Approved

In business since 2005

Free estimates

Emergency services offered

"I did A LOT of research for three bathroom projects and chose Serden Group, because the team is knowledgeable, honest, kind, affordable, and most importantly the type of people I can have in my house for months during long renovations. I appreciate their integrity, attention to detail and making my needs a priority. Looking forward to them building my new ADU!"
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+121

Response time1 day
Response rate85%
51 neighbors recently requested a quote
Avatar for TimelessBuilders
TimelessBuilders
4.9(
14
)
Addition to Existing Structure - Build

Serving Beaverton, OR and surrounding areas

Approved

In business since 2006

Free estimates

Emergency services offered

"Overall Jay is excellent. He is responsive, always answers texts or phone calls quickly and generally does what he says he will do. Like all construction projects there were small issues along the way but Jay got on top of them and addressed them quickly. Site was clean during construction work, his subs/trades were all good, nice people, skilled workers who did excellent quality work. Overall this was done well and in an acceptable timeframe. I think generally construction could have been executed quicker, there were a few times when no-one was working at the house that could have shaved some time. But, given my extensive experience with construction Jay is one of the good ones ! His estimate was high but he came in well under it and within sight of what I expected things to cost. I will (I am) definately using him again..."
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Recommended by100%of homeowners
Avatar for Triple D Construction, Inc.
Triple D Construction, Inc.
5.0(
11
)
Addition to Existing Structure - Build

Serving Beaverton, 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%
14 neighbors recently requested a quote
Avatar for Baurer Construction & Flooring
Baurer Construction & Flooring
4.9(
68
)
Addition to Existing Structure - Build

Serving Beaverton, OR and surrounding areas

Approved

In business since 1987

Emergency services offered

Small jobs welcome

"This is the second project that we have hired JAW Construction for and we are very happy with how our remodel turned out. As this was a major kitchen, dining and living room remodel, which meant we were not going to be able to be in those rooms during the construction, John and I worked on the timeline to ensure it went as smoothly as possible. Before the project started, Mark from Amcraft Cabinets came out and measured and talked with us to determine how best to use the space. We came up with several cool options including a pull out spice rack and a lift for my mixer. Once the project began, John, Brian, the electricians Clint, Christian and Tyler and the plumber Mike were always on time, friendly, always available for questions and cleaned up after themselves. John estimated that the project would take six weeks and it ended up taking five weeks! While it was not fun to be without a kitchen, we are so happy with how it turned out, it made it all worth it. Everyone that has seen our remodeled areas or pictures of them are very impressed. I highly recommend hiring JAW Construction and we are already planning our next project with John."
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Recommended by100%of homeowners
Avatar for Kolt Construction, LLC
Kolt Construction, LLC
5.0(
11
)
Addition to Existing Structure - Build

Serving Beaverton, OR and surrounding areas

Approved

In business since 2023

Free estimates

Credit card accepted

"I can tell you that Kolt Construction is amazing! They did some remodel work for me and I couldn't be happier. Austin were very detail oriented and communicative. The quality of their work is top-notch. If you're looking for a reliable construction company, definitely give Kolt Construction a shot!"
5 neighbors recently requested a quote
Recommended by90%of homeowners
Avatar for Backyard Blueprint
Backyard Blueprint
5.0(
8
)
Addition to Existing Structure - Build

Serving Beaverton, OR and surrounding areas

Approved

In business since 2024

Free estimates

Warranties offered

"Matthew Bruce exceeded our expectations. Our 92-year-old dad fell while using the bathroom and injured himself. We needed an immediate response to make the bathroom safe. Matthew responded to my request very quickly. He asked questions about the situation that showed he had the expertise we needed. He came to the house within a day of agreeing to perform the work and completed the most urgent task that day. He needed other tools to complete the installation of the grab bar drilled into the shower tiles, so he had to return at a later time. He communicated clearly when he could return and completed the task. Additionally, he cleaned up after his work and was pleasant to workMatthew Bruce exceeded our expectations. Our 92-year-old dad fell while using the bathroom and injured himself, so we needed an immediate response to make the bathroom safe. Matthew quickly responded to my request, asking detailed questions that demonstrated his expertise. He came to our house within a day of agreeing to do the work and completed the most urgent task that same day. To install a grab bar drilled into the shower tiles, he needed additional tools, so he had to return later to finish the job. He communicated clearly about when he could come back and completed the task efficiently. Furthermore, he cleaned up after his work and was pleasant to work with. with."
ADU
General Remodeling Project
ADU
ADU
ADU

+4

2 neighbors recently requested a quote
Recommended by14%of homeowners
Avatar for Red Bull Development, LLC
Red Bull Development, LLC
4.5(
11
)
Addition to Existing Structure - Build

Serving Beaverton, OR and surrounding areas

Approved

In business since 2000

Free estimates

Customers say: Quick response

"I trust Dan, the owner, to do a perfect job. After I hired him to do a major remodel, he did work at my son's house, and my son was extremely happy with him as well. I have another project on my list and I plan on hiring Dan to do it."
Silverton
Addition
Addition
New Home Build
New Home Build

+2

Response time10 hrs
Recommended by100%of homeowners
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FAQs for addition to existing structure building service projects in Beaverton, 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 Beaverton, 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.