ADUs & conversions · Issaquah, WA
Attached ADU Build in Issaquah, WA
Attached accessory dwelling units within the home's footprint.
Attached ADU Build in Issaquah, WA
When Issaquah homeowners search for attached ADU build or a dependable adus & conversions contractor near them, they want craftsmanship that lasts and a crew that communicates. That's exactly what we do. Attached accessory dwelling units within the home's footprint.
Issaquah's Highlands and older in-town homes alike benefit from energy-smart upgrades and remodels that respect the surrounding terrain.
We write scope in plain terms: what we'll do, the materials, the sequence, and how any surprises are handled if something is uncovered.
What's included in your attached ADU build
A typical attached ADU build in Issaquah can involve foundation, utilities, finishes, the kitchen and bath — and we put the full scope in writing so you know exactly what's covered before work starts.
You get a single point of contact, licensed and insured trades, and clear communication from the first sketch to the final walkthrough.
How much does an attached ADU build cost in Issaquah?
Most attached ADU build projects in Issaquah fall between $174,000 – $522,500, 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 adus & conversions project — so there are no surprises later.
Why Issaquah homeowners choose Xion Build
Meticulous job sites and clear daily communication, with respect for your home, your time, and your neighbors.
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 Issaquah adus & conversions process
We pull the permits, schedule every trade in the right order, and protect your home, landscaping, and daily routine throughout the build.
It starts with a free, no-obligation consultation: what you want, the constraints, and a realistic budget range before you commit to anything.
Handoff includes a detailed walkthrough and a written warranty — not a crew that vanishes the moment the dust settles.
Frequently asked questions
Are you a licensed adus & conversions 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 an attached ADU build?
Your budget range, must-haves, timeline, and any finishes you already love. For adus & conversions work we also review access, existing conditions, and whether permits are required in Issaquah.
How long does an attached ADU build take?
Timelines depend on scope and permitting. Once the plan is confirmed we give you a realistic schedule and keep you updated as the adus & conversions work progresses.
Do you handle permits and inspections?
Yes. We manage permit applications, schedule inspections, and coordinate any required engineering so the work passes cleanly in Issaquah.
How much does an attached ADU build cost in Issaquah?
Most attached ADU build projects in Issaquah run $174,000 – $522,500, depending on scope, finishes, and existing conditions. After a free in-home consultation we provide a detailed written estimate so your Issaquah price reflects the actual project — not a guess.
Related services in Issaquah
ADU design & permitting
Plans and permits navigating local ADU rules.
View detailsGarage conversion to ADU
Convert a garage into a legal, livable ADU.
View detailsADU utility & meter separation
Separate utilities and metering for rentals.
View detailsADU kitchen & bath build-out
Compact, efficient kitchens and baths for ADUs.
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