ADUs & conversions · Bellevue, WA
Attached ADU Build in Bellevue, WA
Attached accessory dwelling units within the home's footprint.
Attached ADU Build in Bellevue, WA
Looking for attached ADU build in Bellevue? Xion Build is a licensed, bonded, and insured adus & conversions contractor delivering standout results for Bellevue homeowners — start to finish, under one roof. Attached accessory dwelling units within the home's footprint.
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 attached ADU build
A typical attached ADU build in Bellevue can involve finishes, utilities, framing, the kitchen and bath — 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 an attached ADU build cost in Bellevue?
Most attached ADU build projects in Bellevue fall between $174,000 – $522,500, 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
Transparent, written estimates with no hidden fees — you know what you're paying for before work begins.
Local crews who know Eastside permitting, inspections, and the way Pacific Northwest weather tests a home.
One dedicated point of contact coordinates the entire job, so you're never chasing subcontractors or wondering who's responsible.
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.
It starts with a free, no-obligation consultation: what you want, the constraints, and a realistic budget range before you commit to anything.
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 an attached ADU build in Bellevue, WA?
Yes. Attached accessory dwelling units within the home's footprint. Xion Build is a licensed, bonded, and insured adus & conversions contractor serving Bellevue and the surrounding WA communities.
How much does an attached ADU build cost in Bellevue?
Most attached ADU build projects in Bellevue run $174,000 – $522,500, 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.
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.
How long does an attached ADU build 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.
Do you offer free estimates for attached ADU build near Bellevue?
Absolutely. We provide free, no-obligation in-home estimates throughout Bellevue and the greater Eastside, with transparent, itemized pricing.
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