Windows & doors · Mercer Island, WA
Window Replacement in Mercer Island, WA
Energy-efficient replacement windows with proper flashing.
Window Replacement in Mercer Island, WA
Looking for window replacement in Mercer Island? Xion Build is a licensed, bonded, and insured windows & doors contractor delivering standout results for Mercer Island homeowners — start to finish, under one roof. Energy-efficient replacement windows with proper flashing.
Mercer Island projects often involve sloped lots, shoreline rules, and mid-century homes that benefit from thoughtful structural and design planning.
Windows and doors are where comfort, energy bills, and curb appeal meet — proper flashing and air sealing matter as much as the units themselves.
What's included in your window replacement
A typical window replacement in Mercer Island can involve weatherproofing, trim, hardware, flashing — and we put the full scope in writing so you know exactly what's covered before work starts.
From energy-efficient replacement windows to patio sliders, entry doors, and folding glass walls, we install for a weather-tight, draft-free fit.
How much does a window replacement cost in Mercer Island?
Most window replacement projects in Mercer Island fall between $10,500 – $52,000, 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 windows & doors project — so there are no surprises later.
Why Mercer Island homeowners choose Xion Build
Transparent, written estimates with no hidden fees — you know what you're paying for before work begins.
Honest guidance on where to invest and where to save, so your budget goes toward what adds real, lasting value.
Local crews who know Eastside permitting, inspections, and the way Pacific Northwest weather tests a home.
Our Mercer Island windows & doors process
Handoff includes a detailed walkthrough and a written warranty — not a crew that vanishes the moment the dust settles.
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
Are you a licensed windows & doors 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 window replacement?
Your budget range, must-haves, timeline, and any finishes you already love. For windows & doors work we also review access, existing conditions, and whether permits are required in Mercer Island.
How long does a window replacement take?
Timelines depend on scope and permitting. Once the plan is confirmed we give you a realistic schedule and keep you updated as the windows & doors work progresses.
Do you offer a window replacement in Mercer Island, WA?
Yes. Energy-efficient replacement windows with proper flashing. Xion Build is a licensed, bonded, and insured windows & doors contractor serving Mercer Island and the surrounding WA communities.
Do you handle permits and inspections?
Yes. We manage permit applications, schedule inspections, and coordinate any required engineering so the work passes cleanly in Mercer Island.
Related services in Mercer Island
Glass wall & window walls
Large fixed glass and window-wall assemblies.
View detailsGarage door replacement
Insulated garage doors with smart openers.
View detailsBi-fold & accordion doors
Folding glass walls that open rooms to the outdoors.
View detailsEgress window installation
Code-compliant egress windows and wells for basements.
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