Home additions · Renton, WA
Sunroom & Four-Season Room in Renton, WA
Insulated, conditioned sunrooms usable year-round.
Sunroom & Four-Season Room in Renton, WA
Xion Build provides expert sunroom & four-season room in Renton. As a trusted Renton home additions contractor, we manage design, materials, permits, and every trade in-house so your project stays on schedule and on budget. Insulated, conditioned sunrooms usable year-round.
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 sunroom & four-season room
A typical sunroom & four-season room in Renton can involve foundation work, roofline tie-in, framing, insulation — 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 sunroom & four-season room cost in Renton?
Most sunroom & four-season room projects in Renton fall between $111,500 – $325,500, 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 Renton homeowners choose Xion Build
Local crews who know Eastside permitting, inspections, and the way Pacific Northwest weather tests a home.
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.
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.
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
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 sunroom & four-season room?
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 free estimates for sunroom & four-season room near Renton?
Absolutely. We provide free, no-obligation in-home estimates throughout Renton and the greater Eastside, with transparent, itemized pricing.
Do you offer a sunroom & four-season room in Renton, WA?
Yes. Insulated, conditioned sunrooms usable year-round. Xion Build is a licensed, bonded, and insured home additions contractor serving Renton and the surrounding WA communities.
How long does a sunroom & four-season room 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
Addition design & engineering
Architectural plans and structural engineering for additions.
View detailsFoundation & footings for additions
Engineered footings and foundations for new square footage.
View detailsTwo-story great-room expansion
Vaulted, two-story living additions with structural steel where needed.
View detailsBump-out addition
Small cantilevered bump-outs to expand kitchens, baths, or dining.
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