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

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

Serving Redmond, 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 Redmond, WA and surrounding areas

Approved

Super Service Award Winner

In business since 2011

Free estimates

Warranties offered

"Ryan responded quickly and we were able to discuss the scope of our project. He followed up by talking to the city building department to determine what was possible and proposed a plan to get started. He also talked with us about other projects we had in mind to update our existing home. Very professional!"
Remodeling - General Project
Remodeling - Kitchen & Bathroom Project
Remodeling - General Project
Remodeling - Kitchen & Bathroom Project
Remodeling - Kitchen & Bathroom Project

+75

Response time11 hrs
6 neighbors recently requested a quote
Recommended by92%of homeowners
Avatar for JJ Construction & Home Solutions, LLC
JJ Construction & Home Solutions, LLC
4.7(
46
)
Addition to Existing Structure - Build

Serving Redmond, WA and surrounding areas

Approved

In business since 2014

Free estimates

Warranties offered

"J J Construction owner Khoa Ha completely replaced my upper and lower decks with composite. He solved many problems we were facing with the decks and designed a system to deflect rain water away from the house. The upper deck was 48'x12' and the lower deck 14'x21', also replaced existing stairs, added bench seating. and lights. In addition he also repaired/reflashed metal roof on the lower back of the house and address foundation concerns. His team were great to work with, hard working, professional and courteous. We could not be happier with the results of this 4 week project. I highly recommend J J Construction for any project. We will be using him on future projects as well such as house painting, and some interior remodeling in the coming year."
Ernie
Ernie
Ernie
Ernie
Ernie

+144

Response time5 days
Recommended by94%of homeowners
Avatar for Topaz Remodeling, Inc.
Topaz Remodeling, Inc.
5.0(
141
)
Addition to Existing Structure - Build

Serving Redmond, 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%
270 neighbors recently requested a quote
Avatar for Treiber Building, LLC
Treiber Building, LLC
4.9(
12
)
Addition to Existing Structure - Build

Serving Redmond, 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 Classic Remodeling NW Inc
Classic Remodeling NW Inc
4.5(
45
)
Addition to Existing Structure - Build

Serving Redmond, WA and surrounding areas

Approved

In business since 2009

Free estimates

Emergency services offered

"Overall, we are pleased with the results - our house has really been transformed. The mill work is beautiful, and we had drawers and shelves built in to our master bedroom area that we are very pleased with. I recommend hiring a designer and having that worked out ahead of time. There were several quality issues (getting things level, window trim and tiling work in bathrooms); however my understanding is that this is not typical and due to some new crew members and the project manager being over capacity. The owners have been great to work with - responsive and very patient with our cumbersome loan process (even when it meant delay in payment to them by several weeks). They have been working with us to make sure quality issues get addressed and have been instilled confidence in us about the degree to which they stand behind their work."
Granite countertop with polished finish
Walk-in shower big enough to escape in
Long view shot of kitchen to back door
Kitchen Storage and Refrigerator
Long view shot of kitchen from back door

+20

Response rate100%
1 neighbors recently requested a quote
Recommended by88%of homeowners
Near Me Roofing Company
5.0(
74
)
Addition to Existing Structure - Build

Serving Redmond, WA and surrounding areas

Approved

In business since 2012

Free estimates

Credit card accepted

"Their roof repair services go beyond any industry standards. Having to deal with many contractors, we as property management company have found peace of mind when it comes to such services. Ari and Elijah is exceptional and efficient. They have helped several times to fix many of roof leaks in the building we manage. We always thank their hard work."
Response time4 days
Recommended by80%of homeowners
Avatar for Prorab Construction & Remodeling
Prorab Construction & Remodeling
5.0(
25
)
Addition to Existing Structure - Build

Serving Redmond, WA and surrounding areas

Approved

In business since 2018

Free estimates

Emergency services offered

"Amazing experience with this company! They painted our ceilings and were Incredibly professional, flexible, and receptive to feedback. The work is high-quality, and the house looks as good as new. They left the place cleaner than it was to start with. Will definitely use them again!"
New roof and fixed deck
New roof and fixed deck
New roof and fixed deck
New roof and fixed deck
New roof and fixed deck

+222

Response time7 hrs
Response rate100%
3 neighbors recently requested a quote
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FAQs for addition to existing structure building service projects in Redmond, 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 Redmond, 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.