Home additions · Mercer Island, WA
Garage Addition in Mercer Island, WA
Attached or detached garages framed, wired, and finished.
Garage Addition in Mercer Island, WA
Looking for garage addition in Mercer Island? Xion Build is a licensed, bonded, and insured home additions contractor delivering standout results for Mercer Island homeowners — start to finish, under one roof. Attached or detached garages framed, wired, and finished.
Mercer Island projects often involve sloped lots, shoreline rules, and mid-century homes that benefit from thoughtful structural and design planning.
From room additions and bump-outs to second stories and full primary suites, we handle structural engineering and permits up front so there are no surprises.
What's included in your garage addition
A typical garage addition in Mercer Island can involve roofline tie-in, framing, finishes, windows — and we put the full scope in writing so you know exactly what's covered before work starts.
A home addition lives or dies on the connection to the existing house — foundation, framing, and rooflines have to marry seamlessly so the new space feels original.
How much does a garage addition cost in Mercer Island?
Most garage addition projects in Mercer Island fall between $56,000 – $168,500, 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 home additions project — so there are no surprises later.
Why Mercer Island homeowners choose Xion Build
One dedicated point of contact coordinates the entire job, so you're never chasing subcontractors or wondering who's responsible.
Local crews who know Eastside permitting, inspections, and the way Pacific Northwest weather tests a home.
Meticulous job sites and clear daily communication, with respect for your home, your time, and your neighbors.
Our Mercer Island home additions process
Design and material selections come next, so finishes, fixtures, and pricing are locked in before demolition — no surprises mid-project.
It starts with a free, no-obligation consultation: what you want, the constraints, and a realistic budget range before you commit to anything.
Each phase is inspected and documented, and we keep you updated so you always know what's happening and what's next.
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 Mercer Island.
Do you offer free estimates for garage addition near Mercer Island?
Absolutely. We provide free, no-obligation in-home estimates throughout Mercer Island and the greater Eastside, with transparent, itemized pricing.
How long does a garage addition take?
Timelines depend on scope and permitting. Once the plan is confirmed we give you a realistic schedule and keep you updated as the home additions work progresses.
How much does a garage addition cost in Mercer Island?
Most garage addition projects in Mercer Island run $56,000 – $168,500, depending on scope, finishes, and existing conditions. After a free in-home consultation we provide a detailed written estimate so your Mercer Island price reflects the actual project — not a guess.
Do you offer a garage addition in Mercer Island, WA?
Yes. Attached or detached garages framed, wired, and finished. Xion Build is a licensed, bonded, and insured home additions contractor serving Mercer Island and the surrounding WA communities.
Related services in Mercer Island
Bump-out addition
Small cantilevered bump-outs to expand kitchens, baths, or dining.
View detailsMudroom & entry addition
Drop-zone mudrooms with lockers, benches, and storage.
View detailsFoundation & footings for additions
Engineered footings and foundations for new square footage.
View detailsIn-law suite addition
Self-contained suite with bedroom, bath, and kitchenette.
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