Basement finishing · Mercer Island, WA
Basement Gym & Flex Space in Mercer Island, WA
Durable, flexible spaces for gyms and play.
Basement Gym & Flex Space in Mercer Island, WA
When Mercer Island homeowners search for basement gym & flex space or a dependable basement finishing contractor near them, they want craftsmanship that lasts and a crew that communicates. That's exactly what we do. Durable, flexible spaces for gyms and play.
Mercer Island projects often involve sloped lots, shoreline rules, and mid-century homes that benefit from thoughtful structural and design planning.
We write scope in plain terms: what we'll do, the materials, the sequence, and how any surprises are handled if something is uncovered.
What's included in your basement gym & flex space
A typical basement gym & flex space in Mercer Island can involve framing, insulation, egress, finishes — and we put the full scope in writing so you know exactly what's covered before work starts.
You get a single point of contact, licensed and insured trades, and clear communication from the first sketch to the final walkthrough.
How much does a basement gym & flex space cost in Mercer Island?
Most basement gym & flex space projects in Mercer Island fall between $24,000 – $66,000, 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 basement finishing 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.
Honest guidance on where to invest and where to save, so your budget goes toward what adds real, lasting value.
Our Mercer Island basement finishing process
We pull the permits, schedule every trade in the right order, and protect your home, landscaping, and daily routine throughout the build.
Each phase is inspected and documented, and we keep you updated so you always know what's happening and what's next.
Design and material selections come next, so finishes, fixtures, and pricing are locked in before demolition — no surprises mid-project.
Frequently asked questions
Are you a licensed basement finishing contractor?
Yes — Xion Build is licensed, bonded, and insured in WA. Every project is built to meet or exceed code and is backed by a written warranty.
How long does a basement gym & flex space take?
Timelines depend on scope and permitting. Once the plan is confirmed we give you a realistic schedule and keep you updated as the basement finishing work progresses.
How much does a basement gym & flex space cost in Mercer Island?
Most basement gym & flex space projects in Mercer Island run $24,000 – $66,000, 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 handle permits and inspections?
Yes. We manage permit applications, schedule inspections, and coordinate any required engineering so the work passes cleanly in Mercer Island.
What should we decide before starting a basement gym & flex space?
Your budget range, must-haves, timeline, and any finishes you already love. For basement finishing work we also review access, existing conditions, and whether permits are required in Mercer Island.
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