In-Law & Multigenerational Suite in Mercer Island, WA

In-Law & Multigenerational Suite in Mercer Island, WA

Looking for in-law & multigenerational suite in Mercer Island? Xion Build is a licensed, bonded, and insured adus & conversions contractor delivering standout results for Mercer Island homeowners — start to finish, under one roof. Self-contained suites for extended family.

Mercer Island projects often involve sloped lots, shoreline rules, and mid-century homes that benefit from thoughtful structural and design planning.

You get a single point of contact, licensed and insured trades, and clear communication from the first sketch to the final walkthrough.

What's included in your in-law & multigenerational suite

A typical in-law & multigenerational suite in Mercer Island can involve the kitchen and bath, utilities, foundation, framing — and we put the full scope in writing so you know exactly what's covered before work starts.

We write scope in plain terms: what we'll do, the materials, the sequence, and how any surprises are handled if something is uncovered.

How much does an in-law & multigenerational suite cost in Mercer Island?

Most in-law & multigenerational suite projects in Mercer Island fall between $175,500 – $526,500, 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 Mercer Island 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.

Transparent, written estimates with no hidden fees — you know what you're paying for before work begins.

Our Mercer Island adus & conversions process

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

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

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