Basement finishing · Issaquah, WA
Basement Bathroom Addition in Issaquah, WA
Add a bath with proper plumbing and ejector if needed.
Basement Bathroom Addition in Issaquah, WA
Xion Build provides expert basement bathroom addition in Issaquah. As a trusted Issaquah basement finishing contractor, we manage design, materials, permits, and every trade in-house so your project stays on schedule and on budget. Add a bath with proper plumbing and ejector if needed.
Issaquah's Highlands and older in-town homes alike benefit from energy-smart upgrades and remodels that respect the surrounding terrain.
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 basement bathroom addition
A typical basement bathroom addition in Issaquah can involve egress, insulation, framing, electrical — 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 basement bathroom addition cost in Issaquah?
Most basement bathroom addition projects in Issaquah 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 Issaquah homeowners choose Xion Build
Meticulous job sites and clear daily communication, with respect for your home, your time, and your neighbors.
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 Issaquah 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 Issaquah.
Are you a licensed basement finishing contractor?
Yes — Xion Build is licensed, bonded, and insured in WA. Every project is built to meet or exceed code and is backed by a written warranty.
How much does a basement bathroom addition cost in Issaquah?
Most basement bathroom addition projects in Issaquah 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 Issaquah price reflects the actual project — not a guess.
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.
What should we decide before starting a basement bathroom addition?
Your budget range, must-haves, timeline, and any finishes you already love. For basement finishing work we also review access, existing conditions, and whether permits are required in Issaquah.
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