ADU Design & Permitting in Maple Valley, WA

ADU Design & Permitting in Maple Valley, WA

Xion Build provides expert ADU design & permitting in Maple Valley. As a trusted Maple Valley adus & conversions contractor, we manage design, materials, permits, and every trade in-house so your project stays on schedule and on budget. Plans and permits navigating local ADU rules.

Maple Valley's family neighborhoods see strong demand for additions, basement finishes, and kitchen remodels that grow with the household.

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 Maple Valley can involve foundation, the kitchen and bath, utilities, 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 Maple Valley?

Most ADU design & permitting projects in Maple Valley 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 Maple Valley homeowners choose Xion Build

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

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

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

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.

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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