Top Home Expansions and Additions in King County

For over 10 years, Calcon Decks has served as a top home addition contractor on the Seattle area’s Eastside. Locally owned and operated, we deliver creative and high-quality results for you and your family to love and enjoy for many years. We work tirelessly to ensure high customer satisfaction on every project, and our client-centric approach has earned us the designation of ‘Top-Rated Pro’ with Home Advisor. Count on our experienced team for superior design, unmatched craftsmanship and high value.

Expert Home Addition Contractor

Fully licensed, bonded and insured, the home construction specialists at Calcon Decks build home additions of every type and scale. Before we being a building project, you’ll get a virtual tour of your new space to make sure it’s exactly what you want. Using CAD software, you can ‘walk through’ the addition to look at every feature.

Sunrooms
Family Rooms
Bedrooms
Porches

Home Theaters
Media Rooms
Additional Stories
Dormers

Washington Building Code Experts

The project lead assigned to your project will ensure your addition meets both your and the state’s high building standards. Our team has an intimate understanding of all Washington state building codes, and we know what will and won’t pass inspection. As a proven and trusted local expert, you can rest easier knowing your home addition contractor has all the legal boxes checked.

Other Services

While we regularly design and build a wide variety of beautiful home additions, we also specialize in deck and patio cover construction. You can trust our experience to expand the home you love with strategically added space, or enhace it within your existing space. Contact us today to discuss your project ideas with one of our experienced pros.

Expert Home Expansions and Additions Contractor:

Serving Bellevue, Kirkland, Redmond, Mill Creek, Cathcart, Kenmore, Bothell, Woodinville, Kingsgate, Sammamish, Newcastle, Lynnwood, Edmonds & Issaquah

Calcon Decks

18 Google reviews

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Murray Vince

26/06/2022

From start to finish we enjoyed working with Nathan and the team at Calcon. Nathan helped us envision and design the new deck. He was thoughtful throughout the design process about space, budget, practical use of the space and materials. The Calcon team showed up on time, and they are clearly committed to excellence. Their workmanship is excellent. On time, on budget and on spec excellence from Calcon. Thank you Nathan and your team of builders.

Alan Edmonds

22/06/2022

Nathan and his team did fantastic work. On time, within budget and very easy to work with. I would certainly use them again and have referred Nathan to several friends.

B John

26/05/2022

Nathan built Patio cover and deck for us and quality of his workmanship is excellent. He is very professional and and has eye for details. What I liked about him compared to others which I got the quote was that he explained in detail the engineering, he knows his work. He really cares on the architecture details and makes sure, that it fits and aligns well with current building architecture. He is a great contractor and would recommend him for projects. I will definitely hire him for my future projects.

Devin Howard

07/05/2022

CalCon took on a huge project at our place in Anacortes, WA. He rebuilt a whole ocean facing deck, installed new railings/glass, rebuilt a pergola, and replaced wood with more resilient coastal material. He also added a deck drainage systems along with finishing under the decking. I highly recommend him for any deck project. His crew is very hard working and they did an absolute amazing job. Very competent contractor that has a great attention to detail and kept within the budget.

Marian Ericson

03/05/2022

I recently had to have a large deck replaced. This is the 1st major job I have had to do since the loss of my husband. Being a bit leary of the process and where to go, I contacted Nathan for a bid. He was quick to get back to me and when I explained I would like it done prior to June, he worked my project into his schedule and it is now complete. His care and patience with me through it all was very much appreciated. He and the crew did a great job and clean-up after was well done. I would highly recommend them.

Laura Anderson

26/03/2022

I was very impressed with Nathan from the start who was confident and willing to take on a difficult job replacing our deck that no one else wanted to touch. He was consistently on time, kept the job site organized, and had a strong crew who knew what they were doing and worked well together. I am very pleased with the results so far. We have one more phase of work still to complete and I look forward to enjoying the finished product. Would highly recommend.

M Graeber Jordan

02/02/2022

Nathan and I had a detailed discussion and agreement before I signed the contract for my 800 sq ft deck. He and his crew performed the job beyond my expectations. I rate them: Communication A+, Quality A+, Engineering and Design A+. I highly recommend Calcon .

Christina Brown

08/10/2021

Highly recommend Nate and crew. Totally professional and excellent craftsmanship.I loved their work so much I hired them for a second project. I have also recommended them to my neighbors. You will not regret it I promise you.

Nicole Menia

20/07/2021

Nathan and his crew did an exceptional job building a deck for our new home! It was everything we expected and more. Nathan has a wonderful eye for design and helped guide me with the colors and location. I’m excited to use them again when we’re ready for a deck cover!

Ralph Kappelhoff

15/06/2021

Great crew. Super efficient and able to work through any inevitable issues with minimal fuss. We designed a massive 2 part deck and they delivered - including replacement of rotted out elevated deck. See attached pictures for scale.