Family owned · Community built
Built Right. Built to Last.
Aaron Sitzmann has been turning homeowners' visions into reality for over 30 years. From sunrooms that bring the outdoors in, to room additions that grow with your family, we build it like it's our own home.
30+
Years in Business
300+
Projects Completed
100%
Licensed, Bonded & Insured
5★
Average Rating
What we build
Craftsmanship in Every Corner
From the first nail to the final coat of paint, every project gets our full attention and care.
Room Additions
Need more space? We design and build seamless room additions that match your home's existing character, no cookie-cutter solutions.
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Sunrooms
Bring the beauty of the outdoors inside with a custom sunroom. Year-round comfort, natural light, and a space your whole family will love.
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Decks & Outdoor Living
Extend your living space outdoors with a custom deck, porch, or patio. Built to complement your home and stand up to the seasons.
Learn moreFeatured work
Projects We're Proud Of
Every project tells a story. Here are a few of our favorites.
Woodinville Sunroom
Seattle Sunroom
Sammamish Sunroom & Deck Addition
Kirkland Primary Suite Addition
What clients say
Words from Our Neighbors
"The vision we had for this sunroom was exactly what Aaron built. The attention to detail and craftsmanship is of the highest quality. We would work with Aaron again in a heartbeat!"
Tanya J.
2 Story Sunroom Addition
Issaquah
"Aaron provided extremely competent and timely services. He went above and beyond what I expected with no increase in the quoted cost"
Kathleen C.
Sunroom Refresh
Bellevue
"Aaron is probably one of the best people I've worked with on a project. He is very skilled at what he does and is meticulous in the quality and details. He and his team are very professional and down to earth. I would highly recommend Aaron's company and would gladly work with them again!"
Eric L.
Sunroom Addition
Seattle
Let's get started
Ready to Build Something Together?
Every great project starts with a conversation. I'd love to hear about your vision. Whether it's a sunroom, an addition, or something bigger. Let's talk about what's possible.
— Aaron Sitzmann