ADUs & conversions · Federal Way, WA
Detached ADU (DADU) Build in Federal Way, WA
Stand-alone backyard cottages from foundation to finish.
Detached ADU (DADU) Build in Federal Way, WA
When Federal Way homeowners search for detached ADU (DADU) 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. Stand-alone backyard cottages from foundation to finish.
Federal Way's established neighborhoods reward durable, value-driven remodels, roofing, and exterior work.
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 detached ADU (DADU) build
A typical detached ADU (DADU) build in Federal Way can involve finishes, utilities, the kitchen and bath, framing — 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 detached ADU (DADU) build cost in Federal Way?
Most detached ADU (DADU) build projects in Federal Way fall between $180,000 – $450,000, 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 adus & conversions project — so there are no surprises later.
Why Federal Way homeowners choose Xion Build
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.
Meticulous job sites and clear daily communication, with respect for your home, your time, and your neighbors.
Our Federal Way 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.
Design and material selections come next, so finishes, fixtures, and pricing are locked in before demolition — no surprises mid-project.
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 a detached ADU (DADU) build in Federal Way, WA?
Yes. Stand-alone backyard cottages from foundation to finish. Xion Build is a licensed, bonded, and insured adus & conversions contractor serving Federal Way and the surrounding WA communities.
Do you handle permits and inspections?
Yes. We manage permit applications, schedule inspections, and coordinate any required engineering so the work passes cleanly in Federal Way.
How long does a detached ADU (DADU) 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.
How much does a detached ADU (DADU) build cost in Federal Way?
Most detached ADU (DADU) build projects in Federal Way run $180,000 – $450,000, depending on scope, finishes, and existing conditions. After a free in-home consultation we provide a detailed written estimate so your Federal Way price reflects the actual project — not a guess.
Do you offer free estimates for detached ADU (DADU) build near Federal Way?
Absolutely. We provide free, no-obligation in-home estimates throughout Federal Way and the greater Eastside, with transparent, itemized pricing.
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