Top-rated addition to existing structure builders.

Get matched with top addition to existing structure builders in Bellevue, WA

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.

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

Avatar for Johnson and Sons Construction
Johnson and Sons Construction
4.9(
118
)
Addition to Existing Structure - Build

Serving Bellevue, WA and surrounding areas

Approved

Super Service Award Winner

In business since 2008

Free estimates

Warranties offered

"I called Johnson & Sons for a quote on our project to build a new attached garage. Vic answered the phone himself, and while he convinced me that we are too far outside of their normal area of business to be practical, he did spend over 30 minutes answering my questions, and offering some very generous advice and references on how to approach my project. I have to say, I did not expect someone to be as forthright and open with their knowledge and ideas, especially to someone they would not be doing business with. But after reading his other reviews, I can see that this is exactly the kind of expertise and service once can depend on receiving from this highly rated company. Thank you Vic!"
Response time2 days
Response rate100%
7 neighbors recently requested a quote
Avatar for Johnson Custom Builders
Johnson Custom Builders
4.9(
102
)
Addition to Existing Structure - Build

Serving Bellevue, WA and surrounding areas

Approved

Super Service Award Winner

In business since 2011

Free estimates

Warranties offered

"I worked with Johnson Custom Builders to build a home addition from initial consultation to final walk-through. Throughout this process, Ryan was always professional, courteous, and attentive to our needs. He took the time to listen to our ideas and understand our vision, and suggested a design that blends seamlessly with our existing home. Ryan kept us informed every step of the way, providing regular updates on the project timeline, budget, and any issues that arose. His communication skills were excellent, and he was always available to answer our questions and address our concerns. In summary, our experience working with Ryan was outstanding; my wife and I feel like we were well advised throughout the entire process and we made it through lengthy construction work with little stress on our end. Based on our experience, we highly recommend Johnson Custom Builders for your construction needs."
Remodeling - General Project
Remodeling - Kitchen & Bathroom Project
Remodeling - General Project
Remodeling - Kitchen & Bathroom Project
Remodeling - Kitchen & Bathroom Project

+75

Response time11 hrs
7 neighbors recently requested a quote
Recommended by92%of homeowners
Avatar for Topaz Remodeling, Inc.
Topaz Remodeling, Inc.
5.0(
141
)
Addition to Existing Structure - Build

Serving Bellevue, WA and surrounding areas

Approved

Super Service Award Winner

In business since 2014

Free estimates

Emergency services offered

"We hired Topaz Remodeling and Yoni for a home addition to create a bigger living room and extra bedroom. The project involved framing, roofing, and major structural work - and Yoni handled it like a pro. He stayed on top of scheduling, inspections, und kept us updated every step of the way. The new space blends seamlessly with our original house. We are beyond happy with the results!"
Kitchen Remodel
Bathroom Remodel
Kitchen Remodel
Bathroom Remodel
Kitchen Remodel

+63

Response time10 hrs
Response rate100%
285 neighbors recently requested a quote
Avatar for Volcano Builders, Inc.
Volcano Builders, Inc.
5.0(
39
)
Addition to Existing Structure - Build

Serving Bellevue, WA and surrounding areas

Approved

In business since 2021

Free estimates

Warranties offered

"Even though they were managing other jobs, Volcano Builders made us feel like we were their top client. Their responsiveness was excellent, and they always made time to address our concerns. The finished renovation turned out beautiful, and we felt truly taken care of from beginning to end."
Modern Bathroom Remodel
Response time1 day
Response rate98%
Avatar for Treiber Building, LLC
Treiber Building, LLC
4.9(
12
)
Addition to Existing Structure - Build

Serving Bellevue, WA and surrounding areas

Approved

In business since 2016

Free estimates

Offers commercial services

"I interviewed several contractors for my addition and addition and I chose Andrew because I felt like he was straightforward with the project and the risks that come with a remodel of an 80 year old house along with the primary suite addition. Through the design phase, we never felt pressured to make decisions, but were kept informed of the timing of the project and when we needed to make decisions in order to schedule the project in a way that minimized the impact to our family. Andrew walked us through each item in the contract and worked with us to make changes to fit our budget and kept us informed on what we could expect for changes for a project like ours. Once we were out on contract, Andrew helped push permits through county and kept us informed on what we could expect for duration and timing of the project. Once the work began, Andrew and his right hand man Rod worked efficiently and coordinated the project beautifully to minimize the amount of time that we were displaced from our home. Thoughtful suggestions were made to deal with the numerous issues that come with renovating an 80 year old house and Andrew supported my questions on cost impact and the criticality of each change to keep me informed so that we could make decisions that we felt comfortable with. Andrew and his team of subcontractors were all very friendly and respectful of our family, never making myself, my wife, or 3 kids feel unsafe at any time. Even with the changes to the scope of work, Andrew and his team made good on the timeline of the project, completing everything in 3-4 months as promised when we started. The layout and design of the remodel and addition have surpassed our expectations, everything that we did has really made our home both more beautiful and more functional. I would highly recommend Treiber Building and have done so to several family members and colleagues at work. The experience was as positive as I couldâ ve hoped and the results are outstanding."
Kitchen
Living Room
Kitchen
Living Room
Deck Progress Pic

+1

Response time2 days
7 neighbors recently requested a quote
Recommended by87%of homeowners
Avatar for Orion Home Renovations
Orion Home Renovations
4.9(
31
)
Addition to Existing Structure - Build

Serving Bellevue, WA and surrounding areas

Approved

In business since 2012

Free estimates

Emergency services offered

"Sandra and Cesar are excellent to work for and they did a great job remodeling are basement. They converted a garage into two bedrooms, put a new kitchen and bathroom in at a good price and quality. They stick to what they say they're going to do and they are honest. I also like that they have relationships with solid subcontractors and can get some design work done too. I highly recommend them for any of your projects and I will be using them again for our upstairs remodel."
Living Room
Living Room 2
Hallway
Kitchen Counter
Bathroom Renovations

+18

Response time2 days
Response rate91%
2 neighbors recently requested a quote
...
Showing 1-10 of 700
FAQs for addition to existing structure building service projects in Bellevue, WA

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 Bellevue, WA 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.