Home additions · Federal Way, WA
Room Addition in Federal Way, WA
Add a bedroom, office, or living space tied seamlessly into the home.
Room Addition in Federal Way, WA
Looking for room addition in Federal Way? Xion Build is a licensed, bonded, and insured home additions contractor delivering standout results for Federal Way homeowners — start to finish, under one roof. Add a bedroom, office, or living space tied seamlessly into the home.
Federal Way's established neighborhoods reward durable, value-driven remodels, roofing, and exterior work.
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 room addition
A typical room addition in Federal Way can involve insulation, finishes, foundation work, framing — 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 room addition cost in Federal Way?
Most room addition projects in Federal Way fall between $60,000 – $200,000, 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 Federal Way homeowners choose Xion Build
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.
Local crews who know Eastside permitting, inspections, and the way Pacific Northwest weather tests a home.
Our Federal Way home additions process
Handoff includes a detailed walkthrough and a written warranty — not a crew that vanishes the moment the dust settles.
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
Do you offer free estimates for room addition near Federal Way?
Absolutely. We provide free, no-obligation in-home estimates throughout Federal Way and the greater Eastside, with transparent, itemized pricing.
Are you a licensed home additions 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.
What should we decide before starting a room addition?
Your budget range, must-haves, timeline, and any finishes you already love. For home additions work we also review access, existing conditions, and whether permits are required in Federal Way.
How much does a room addition cost in Federal Way?
Most room addition projects in Federal Way run $60,000 – $200,000, depending on scope, finishes, and existing conditions. After a free in-home consultation we provide a detailed written estimate so your Federal Way price reflects the actual project — not a guess.
How long does a room 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 home additions work progresses.
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Structural tie-in & roofline match
Marry new framing and rooflines cleanly to the existing home.
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A large open living and entertaining space.
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