Basement finishing · Seattle, WA
Basement Bathroom Addition in Seattle, WA
Add a bath with proper plumbing and ejector if needed.
Basement Bathroom Addition in Seattle, WA
Looking for basement bathroom addition in Seattle? Xion Build is a licensed, bonded, and insured basement finishing contractor delivering standout results for Seattle homeowners — start to finish, under one roof. Add a bath with proper plumbing and ejector if needed.
From Laurelhurst to Queen Anne, Seattle's older homes often need structural care alongside the kitchen, bath, and addition work that modernizes them.
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 basement bathroom addition
A typical basement bathroom addition in Seattle can involve egress, electrical, insulation, 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 a basement bathroom addition cost in Seattle?
Most basement bathroom addition projects in Seattle fall between $44,500 – $111,500, 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 basement finishing project — so there are no surprises later.
Why Seattle 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.
Transparent, written estimates with no hidden fees — you know what you're paying for before work begins.
Our Seattle basement finishing process
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.
Design and material selections come next, so finishes, fixtures, and pricing are locked in before demolition — no surprises mid-project.
Frequently asked questions
Do you handle permits and inspections?
Yes. We manage permit applications, schedule inspections, and coordinate any required engineering so the work passes cleanly in Seattle.
Do you offer free estimates for basement bathroom addition near Seattle?
Absolutely. We provide free, no-obligation in-home estimates throughout Seattle and the greater Eastside, with transparent, itemized pricing.
How long does a basement bathroom addition take?
Timelines depend on scope and permitting. Once the plan is confirmed we give you a realistic schedule and keep you updated as the basement finishing work progresses.
How much does a basement bathroom addition cost in Seattle?
Most basement bathroom addition projects in Seattle run $44,500 – $111,500, depending on scope, finishes, and existing conditions. After a free in-home consultation we provide a detailed written estimate so your Seattle price reflects the actual project — not a guess.
Do you offer a basement bathroom addition in Seattle, WA?
Yes. Add a bath with proper plumbing and ejector if needed. Xion Build is a licensed, bonded, and insured basement finishing contractor serving Seattle and the surrounding WA communities.
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