Backyard accessory dwelling unit — Bellevue, WA
Last updated: September 24, 2026
What affects the price
Building an ADU is a major project, and the final bill depends on a few key things. Site prep is a big factor; if your land is sloped or needs extensive utility connections, costs go up. The materials you choose—from siding to kitchen finishes—also change the math significantly. Whether you’re building a detached unit or converting an existing garage shifts the permit requirements and structural work needed. We provide exact pricing confirmed free on the call.
About this service
This is a standalone structure built on your property, separate from your main house. People usually build these when they have extra yard space and want to create a private living area for family members or a home office. Factors like site accessibility, utility connections, and foundation type move the price up or down. Exact pricing confirmed free on the call.
Frequently asked in Bellevue
What are the general rules for adding an ADU in Bellevue?
How much does an ADU permit typically cost in Bellevue?
Where can I find a reliable ADU builder in Bellevue?
What is the process for getting an ADU permit in Bellevue?
How do I get a free ADU quote for my Bellevue property?
To get a free ADU quote for your Bellevue property, simply call the number provided. A representative will gather some initial details about your needs and property. They can often schedule an appointment for a specialist to visit. This no-obligation quote will cover the estimated costs. It's the quickest way to understand your ADU possibilities.
Can I get a quote for an accessory dwelling unit contractor in Bellevue?
What are the considerations for renting out an ADU in Bellevue?
Also serving nearby: Kirkland · Renton · Seattle · Kent · Federal Way
More on this: HUD ADU resources — ADU policy and financing research.
Service area details
Serving all of Bellevue — population 151,574; about 4,528 residents per square mile across 33.5 sq mi. ZIP codes covered include 98004, 98005, 98006, 98007, 98008, 98009, 98015.
Neighborhoods served in Bellevue: Factoria, Medina, Bellevue Downtown, Eastgate, Lake Hills — and every surrounding area.
Areas we serve
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