Addition Design & Engineering in Gig Harbor, WA

Addition Design & Engineering in Gig Harbor, WA

Xion Build provides expert addition design & engineering in Gig Harbor. As a trusted Gig Harbor home additions contractor, we manage design, materials, permits, and every trade in-house so your project stays on schedule and on budget. Architectural plans and structural engineering for additions.

Gig Harbor's waterfront homes and view lots call for decks, additions, and kitchens built to make the most of the harbor and the light.

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.

What's included in your addition design & engineering

A typical addition design & engineering in Gig Harbor can involve finishes, roofline tie-in, foundation work, framing — and we put the full scope in writing so you know exactly what's covered before work starts.

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.

How much does an addition design & engineering cost in Gig Harbor?

Most addition design & engineering projects in Gig Harbor fall between $42,000 – $125,500, 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 home additions project — so there are no surprises later.

Why Gig Harbor homeowners choose Xion Build

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

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

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

Our Gig Harbor home additions process

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.

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 Gig Harbor

We also serve these areas