Home additions · Seattle, WA
Sunroom & Four-Season Room in Seattle, WA
Insulated, conditioned sunrooms usable year-round.
Sunroom & Four-Season Room in Seattle, WA
When Seattle homeowners search for sunroom & four-season room or a dependable home additions contractor near them, they want craftsmanship that lasts and a crew that communicates. That's exactly what we do. Insulated, conditioned sunrooms usable year-round.
From Laurelhurst to Queen Anne, Seattle's older homes often need structural care alongside the kitchen, bath, and addition work that modernizes them.
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.
What's included in your sunroom & four-season room
A typical sunroom & four-season room in Seattle can involve finishes, foundation work, roofline tie-in, framing — and we put the full scope in writing so you know exactly what's covered before work starts.
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.
How much does a sunroom & four-season room cost in Seattle?
Most sunroom & four-season room projects in Seattle fall between $128,500 – $374,500, 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 Seattle homeowners choose Xion Build
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.
Honest guidance on where to invest and where to save, so your budget goes toward what adds real, lasting value.
Our Seattle home additions process
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.
Each phase is inspected and documented, and we keep you updated so you always know what's happening and what's next.
Frequently asked questions
Do you offer free estimates for sunroom & four-season room near Seattle?
Absolutely. We provide free, no-obligation in-home estimates throughout Seattle and the greater Eastside, with transparent, itemized pricing.
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 Seattle.
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.
Do you offer a sunroom & four-season room in Seattle, WA?
Yes. Insulated, conditioned sunrooms usable year-round. Xion Build is a licensed, bonded, and insured home additions contractor serving Seattle 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.
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