Home additions · Federal Way, WA
In-Law Suite Addition in Federal Way, WA
Self-contained suite with bedroom, bath, and kitchenette.
In-Law Suite Addition in Federal Way, WA
Looking for in-law suite 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. Self-contained suite with bedroom, bath, and kitchenette.
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 in-law suite addition
A typical in-law suite addition in Federal Way can involve windows, finishes, roofline tie-in, 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 an in-law suite addition cost in Federal Way?
Most in-law suite addition projects in Federal Way fall between $116,500 – $339,500, 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 Federal Way homeowners choose Xion Build
One dedicated point of contact coordinates the entire job, so you're never chasing subcontractors or wondering who's responsible.
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.
Our Federal Way home additions process
Each phase is inspected and documented, and we keep you updated so you always know what's happening and what's next.
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.
Frequently asked questions
Do you offer an in-law suite addition in Federal Way, WA?
Yes. Self-contained suite with bedroom, bath, and kitchenette. Xion Build is a licensed, bonded, and insured home additions contractor serving Federal Way and the surrounding WA communities.
Do you offer free estimates for in-law suite addition near Federal Way?
Absolutely. We provide free, no-obligation in-home estimates throughout Federal Way and the greater Eastside, with transparent, itemized pricing.
Do you handle permits and inspections?
Yes. We manage permit applications, schedule inspections, and coordinate any required engineering so the work passes cleanly in Federal Way.
How long does an in-law suite 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.
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.
Related services in Federal Way
Dining room expansion
Expand or add a formal dining space for gatherings.
View detailsSecond-story addition
Build up to add bedrooms and baths while keeping your lot.
View detailsTwo-story great-room expansion
Vaulted, two-story living additions with structural steel where needed.
View detailsMudroom & entry addition
Drop-zone mudrooms with lockers, benches, and storage.
View detailsWe also serve these areas