ADUs & conversions · Sammamish, WA
Garage Conversion To ADU in Sammamish, WA
Convert a garage into a legal, livable ADU.
Garage Conversion To ADU in Sammamish, WA
Looking for garage conversion to ADU in Sammamish? Xion Build is a licensed, bonded, and insured adus & conversions contractor delivering standout results for Sammamish homeowners — start to finish, under one roof. Convert a garage into a legal, livable ADU.
Sammamish plateau homes are often large and family-focused, where additions, kitchens, and outdoor living spaces deliver the most lasting value.
You get a single point of contact, licensed and insured trades, and clear communication from the first sketch to the final walkthrough.
What's included in your garage conversion to ADU
A typical garage conversion to ADU in Sammamish can involve permits, finishes, utilities, foundation — and we put the full scope in writing so you know exactly what's covered before work starts.
We write scope in plain terms: what we'll do, the materials, the sequence, and how any surprises are handled if something is uncovered.
How much does a garage conversion to ADU cost in Sammamish?
Most garage conversion to ADU projects in Sammamish fall between $69,000 – $184,000, depending on the size of the space, the finishes you choose, and the condition of what's already there.
Because every home is different, we don't quote final numbers sight unseen. After a free in-home consultation you get a detailed, itemized estimate tied to your actual adus & conversions project — so there are no surprises later.
Why Sammamish homeowners choose Xion Build
Licensed, bonded, and insured in Washington — every project is built to meet or exceed code and backed by a written warranty.
One dedicated point of contact coordinates the entire job, so you're never chasing subcontractors or wondering who's responsible.
Meticulous job sites and clear daily communication, with respect for your home, your time, and your neighbors.
Our Sammamish adus & conversions process
Design and material selections come next, so finishes, fixtures, and pricing are locked in before demolition — no surprises mid-project.
We pull the permits, schedule every trade in the right order, and protect your home, landscaping, and daily routine throughout the build.
Handoff includes a detailed walkthrough and a written warranty — not a crew that vanishes the moment the dust settles.
Frequently asked questions
Do you handle permits and inspections?
Yes. We manage permit applications, schedule inspections, and coordinate any required engineering so the work passes cleanly in Sammamish.
How long does a garage conversion to ADU take?
Timelines depend on scope and permitting. Once the plan is confirmed we give you a realistic schedule and keep you updated as the adus & conversions work progresses.
What should we decide before starting a garage conversion to ADU?
Your budget range, must-haves, timeline, and any finishes you already love. For adus & conversions work we also review access, existing conditions, and whether permits are required in Sammamish.
Do you offer free estimates for garage conversion to ADU near Sammamish?
Absolutely. We provide free, no-obligation in-home estimates throughout Sammamish and the greater Eastside, with transparent, itemized pricing.
Do you offer a garage conversion to ADU in Sammamish, WA?
Yes. Convert a garage into a legal, livable ADU. Xion Build is a licensed, bonded, and insured adus & conversions contractor serving Sammamish and the surrounding WA communities.
Related services in Sammamish
ADU kitchen & bath build-out
Compact, efficient kitchens and baths for ADUs.
View detailsIn-law & multigenerational suite
Self-contained suites for extended family.
View detailsDetached ADU (DADU) build
Stand-alone backyard cottages from foundation to finish.
View detailsADU design & permitting
Plans and permits navigating local ADU rules.
View detailsWe also serve these areas