ADUs & conversions · Maple Valley, WA
Attached ADU Build in Maple Valley, WA
Attached accessory dwelling units within the home's footprint.
Attached ADU Build in Maple Valley, WA
When Maple Valley homeowners search for attached ADU build or a dependable adus & conversions contractor near them, they want craftsmanship that lasts and a crew that communicates. That's exactly what we do. Attached accessory dwelling units within the home's footprint.
Maple Valley's family neighborhoods see strong demand for additions, basement finishes, and kitchen remodels that grow with the household.
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 attached ADU build
A typical attached ADU build in Maple Valley can involve finishes, framing, permits, utilities — 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 an attached ADU build cost in Maple Valley?
Most attached ADU build projects in Maple Valley fall between $151,500 – $454,500, 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 Maple Valley 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.
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 Maple Valley adus & conversions process
Handoff includes a detailed walkthrough and a written warranty — not a crew that vanishes the moment the dust settles.
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.
Frequently asked questions
Do you offer an attached ADU build in Maple Valley, WA?
Yes. Attached accessory dwelling units within the home's footprint. Xion Build is a licensed, bonded, and insured adus & conversions contractor serving Maple Valley and the surrounding WA communities.
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.
Do you handle permits and inspections?
Yes. We manage permit applications, schedule inspections, and coordinate any required engineering so the work passes cleanly in Maple Valley.
Do you offer free estimates for attached ADU build near Maple Valley?
Absolutely. We provide free, no-obligation in-home estimates throughout Maple Valley and the greater Eastside, with transparent, itemized pricing.
What should we decide before starting an attached ADU build?
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 Maple Valley.
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