ADUs & conversions · Bellevue, WA
Basement ADU Conversion in Bellevue, WA
Turn a basement into a separate-entry dwelling unit.
Basement ADU Conversion in Bellevue, WA
When Bellevue homeowners search for basement ADU conversion or a dependable adus & conversions contractor near them, they want craftsmanship that lasts and a crew that communicates. That's exactly what we do. Turn a basement into a separate-entry dwelling unit.
From Bridle Trails to West Bellevue, Bellevue homeowners invest in kitchens, baths, and additions that match a high bar for finish quality and durability.
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 ADU conversion
A typical basement ADU conversion in Bellevue can involve permits, finishes, utilities, foundation — 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 ADU conversion cost in Bellevue?
Most basement ADU conversion projects in Bellevue fall between $100,500 – $225,500, 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 adus & conversions project — so there are no surprises later.
Why Bellevue homeowners choose Xion Build
Meticulous job sites and clear daily communication, with respect for your home, your time, and your neighbors.
Honest guidance on where to invest and where to save, so your budget goes toward what adds real, lasting value.
Transparent, written estimates with no hidden fees — you know what you're paying for before work begins.
Our Bellevue adus & conversions process
Each phase is inspected and documented, and we keep you updated so you always know what's happening and what's next.
Handoff includes a detailed walkthrough and a written warranty — not a crew that vanishes the moment the dust settles.
Design and material selections come next, so finishes, fixtures, and pricing are locked in before demolition — no surprises mid-project.
Frequently asked questions
Do you offer a basement ADU conversion in Bellevue, WA?
Yes. Turn a basement into a separate-entry dwelling unit. Xion Build is a licensed, bonded, and insured adus & conversions contractor serving Bellevue and the surrounding WA communities.
How much does a basement ADU conversion cost in Bellevue?
Most basement ADU conversion projects in Bellevue run $100,500 – $225,500, depending on scope, finishes, and existing conditions. After a free in-home consultation we provide a detailed written estimate so your Bellevue price reflects the actual project — not a guess.
What should we decide before starting a basement ADU conversion?
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 Bellevue.
Do you handle permits and inspections?
Yes. We manage permit applications, schedule inspections, and coordinate any required engineering so the work passes cleanly in Bellevue.
Are you a licensed adus & conversions 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.
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