ADUs & conversions · Mukilteo, WA
Attached ADU Build in Mukilteo, WA
Attached accessory dwelling units within the home's footprint.
Attached ADU Build in Mukilteo, WA
Looking for attached ADU build in Mukilteo? Xion Build is a licensed, bonded, and insured adus & conversions contractor delivering standout results for Mukilteo homeowners — start to finish, under one roof. Attached accessory dwelling units within the home's footprint.
Mukilteo's bluff and waterfront homes call for weather-tight exteriors, decks, and remodels designed around the Sound views.
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 Mukilteo can involve foundation, framing, permits, the kitchen and bath — 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 Mukilteo?
Most attached ADU build projects in Mukilteo 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 Mukilteo 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.
Meticulous job sites and clear daily communication, with respect for your home, your time, and your neighbors.
Our Mukilteo adus & conversions process
We pull the permits, schedule every trade in the right order, and protect your home, landscaping, and daily routine throughout the build.
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 handle permits and inspections?
Yes. We manage permit applications, schedule inspections, and coordinate any required engineering so the work passes cleanly in Mukilteo.
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 Mukilteo.
How much does an attached ADU build cost in Mukilteo?
Most attached ADU build projects in Mukilteo run $151,500 – $454,500, depending on scope, finishes, and existing conditions. After a free in-home consultation we provide a detailed written estimate so your Mukilteo price reflects the actual project — not a guess.
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 offer free estimates for attached ADU build near Mukilteo?
Absolutely. We provide free, no-obligation in-home estimates throughout Mukilteo and the greater Eastside, with transparent, itemized pricing.
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