Home additions · Renton, WA
Second-Story Addition in Renton, WA
Build up to add bedrooms and baths while keeping your lot.
Second-Story Addition in Renton, WA
When Renton homeowners search for second-story 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. Build up to add bedrooms and baths while keeping your lot.
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 second-story addition
A typical second-story addition in Renton can involve roofline tie-in, framing, insulation, 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 a second-story addition cost in Renton?
Most second-story addition projects in Renton fall between $150,000 – $400,000, 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
Transparent, written estimates with no hidden fees — you know what you're paying for before work begins.
Licensed, bonded, and insured in Washington — every project is built to meet or exceed code and backed by a written warranty.
Meticulous job sites and clear daily communication, with respect for your home, your time, and your neighbors.
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.
Design and material selections come next, so finishes, fixtures, and pricing are locked in before demolition — no surprises mid-project.
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
How much does a second-story addition cost in Renton?
Most second-story addition projects in Renton run $150,000 – $400,000, 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.
What should we decide before starting a second-story 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.
Do you offer a second-story addition in Renton, WA?
Yes. Build up to add bedrooms and baths while keeping your lot. Xion Build is a licensed, bonded, and insured home additions contractor serving Renton and the surrounding WA communities.
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.
How long does a second-story 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
Bump-out addition
Small cantilevered bump-outs to expand kitchens, baths, or dining.
View detailsAddition design & engineering
Architectural plans and structural engineering for additions.
View detailsFoundation & footings for additions
Engineered footings and foundations for new square footage.
View detailsGreat room addition
A large open living and entertaining space.
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