Adu permit — 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
Getting an ADU permit is the legal process of obtaining local government approval for your building project. You cannot legally construct or occupy an ADU without this documentation. You need this service before any construction begins to ensure your build meets building codes and safety regulations.
Frequently asked in Bellevue
What kind of ADU services are available in Bellevue?
Can I build a home with an in-law suite in Bellevue?
How do I find an ADU builder near me in Bellevue?
What's involved in getting an ADU permit in Bellevue, Washington?
How is accessory dwelling unit financing typically handled?
Are there ADU services available in Accessory Dwelling Unit New Hampshire?
What exactly is an accessory dwelling unit?
An accessory dwelling unit, or ADU, is a secondary housing unit on a single-family residential lot. It can be attached to the main house or a separate structure, like a backyard cottage or a garage conversion. ADUs offer independent living spaces with their own kitchen, bathroom, and sleeping areas. They are a flexible way to add housing capacity in areas like 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: Downtown Bellevue, Factoria, Eastgate, Overlake, Medina, Clyde Hill — and every surrounding area.
Areas we serve
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