Basement ADU Conversion in Federal Way, WA

Basement ADU Conversion in Federal Way, WA

When Federal Way 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.

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 basement ADU conversion

A typical basement ADU conversion in Federal Way can involve framing, finishes, the kitchen and bath, permits — 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 Federal Way?

Most basement ADU conversion projects in Federal Way fall between $87,000 – $196,000, 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

Meticulous job sites and clear daily communication, with respect for your home, your time, and your neighbors.

One dedicated point of contact coordinates the entire job, so you're never chasing subcontractors or wondering who's responsible.

Local crews who know Eastside permitting, inspections, and the way Pacific Northwest weather tests a home.

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.

Handoff includes a detailed walkthrough and a written warranty — not a crew that vanishes the moment the dust settles.

Frequently asked questions

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