ADU Design & Permitting in Federal Way, WA

ADU Design & Permitting in Federal Way, WA

When Federal Way homeowners search for ADU design & permitting or a dependable adus & conversions contractor near them, they want craftsmanship that lasts and a crew that communicates. That's exactly what we do. Plans and permits navigating local ADU rules.

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 ADU design & permitting

A typical ADU design & permitting in Federal Way can involve utilities, framing, foundation, finishes — 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 ADU design & permitting cost in Federal Way?

Most ADU design & permitting projects in Federal Way fall between $83,000 – $187,000, 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

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

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.

Our Federal Way adus & conversions process

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.

Each phase is inspected and documented, and we keep you updated so you always know what's happening and what's next.

Frequently asked questions

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