Home additions · Renton, WA
Room Addition in Renton, WA
Add a bedroom, office, or living space tied seamlessly into the home.
Room Addition in Renton, WA
When Renton homeowners search for room addition or a dependable home additions contractor near them, they want craftsmanship that lasts and a crew that communicates. That's exactly what we do. Add a bedroom, office, or living space tied seamlessly into the home.
Renton's mix of established and newer neighborhoods makes practical, value-driven remodels and roofing projects especially worthwhile.
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 Renton can involve roofline tie-in, finishes, insulation, 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 Renton?
Most room addition projects in Renton 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 Renton homeowners choose Xion Build
Honest guidance on where to invest and where to save, so your budget goes toward what adds real, lasting value.
Licensed, bonded, and insured in Washington — every project is built to meet or exceed code and backed by a written warranty.
Local crews who know Eastside permitting, inspections, and the way Pacific Northwest weather tests a home.
Our Renton 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.
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
How much does a room addition cost in Renton?
Most room addition projects in Renton 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 Renton price reflects the actual project — not a guess.
Do you offer a room addition in Renton, WA?
Yes. Add a bedroom, office, or living space tied seamlessly into the home. Xion Build is a licensed, bonded, and insured home additions contractor serving Renton and the surrounding WA communities.
Do you offer free estimates for room addition near Renton?
Absolutely. We provide free, no-obligation in-home estimates throughout Renton and the greater Eastside, with transparent, itemized pricing.
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 Renton.
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.
Related services in Renton
Second-story addition
Build up to add bedrooms and baths while keeping your lot.
View detailsBump-out addition
Small cantilevered bump-outs to expand kitchens, baths, or dining.
View detailsAddition design & engineering
Architectural plans and structural engineering for additions.
View detailsTwo-story great-room expansion
Vaulted, two-story living additions with structural steel where needed.
View detailsWe also serve these areas