Primary Suite Addition in Mill Creek, WA

Primary Suite Addition in Mill Creek, WA

Xion Build provides expert primary suite addition in Mill Creek. As a trusted Mill Creek home additions contractor, we manage design, materials, permits, and every trade in-house so your project stays on schedule and on budget. A new primary bedroom, bath, and closet wing.

Mill Creek's well-kept neighborhoods reward high-quality kitchen, bath, and outdoor-living upgrades that match the community's standard.

From room additions and bump-outs to second stories and full primary suites, we handle structural engineering and permits up front so there are no surprises.

What's included in your primary suite addition

A typical primary suite addition in Mill Creek can involve roofline tie-in, finishes, insulation, foundation work — and we put the full scope in writing so you know exactly what's covered before work starts.

A home addition lives or dies on the connection to the existing house — foundation, framing, and rooflines have to marry seamlessly so the new space feels original.

How much does a primary suite addition cost in Mill Creek?

Most primary suite addition projects in Mill Creek fall between $103,500 – $345,000, 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 home additions project — so there are no surprises later.

Why Mill Creek homeowners choose Xion Build

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

Licensed, bonded, and insured in Washington — every project is built to meet or exceed code and backed by a written warranty.

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

Our Mill Creek home additions process

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

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.

Frequently asked questions

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