Detached ADU (DADU) Build in Bellevue, WA

Detached ADU (DADU) Build in Bellevue, WA

When Bellevue 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.

From Bridle Trails to West Bellevue, Bellevue homeowners invest in kitchens, baths, and additions that match a high bar for finish quality and durability.

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 Bellevue can involve permits, finishes, framing, foundation — 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 Bellevue?

Most detached ADU (DADU) build projects in Bellevue fall between $207,000 – $517,500, 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 Bellevue homeowners choose Xion Build

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

Honest guidance on where to invest and where to save, so your budget goes toward what adds real, lasting value.

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

Our Bellevue adus & conversions process

It starts with a free, no-obligation consultation: what you want, the constraints, and a realistic budget range before you commit to anything.

Design and material selections come next, so finishes, fixtures, and pricing are locked in before demolition — no surprises mid-project.

We pull the permits, schedule every trade in the right order, and protect your home, landscaping, and daily routine throughout the build.

Frequently asked questions

Related services in Bellevue

We also serve these areas