Cost of accessory dwelling unit — Kent, WA
Last updated: September 24, 2026
What affects the price
Building an ADU involves several moving parts that shape your total budget. The biggest factor is whether you choose a prefabricated unit or a custom build on-site. Site preparation is also significant; if your land requires extensive grading, utility trenching, or foundation work, costs will climb. Your choice of finishes—like kitchen cabinetry, flooring, and siding materials—also shifts the bottom line. We help you navigate these variables to find a setup that fits your property. Exact pricing confirmed free on the call.
About this service
The total price for an ADU depends on several moving parts, including the square footage, your foundation type, and local labor rates. Choosing high-end finishes or complex site prep will naturally increase the budget, while standard layouts help keep things manageable. Exact pricing confirmed free on the call.
Frequently asked in Kent
What permits are needed for an ADU in Kent, Washington?
What is the construction cost for an ADU in Kent?
Are emergency ADUs a service offered in Kent?
What are accessory dwelling units in Kent?
Accessory dwelling units (ADUs) in Kent, Washington, are secondary housing units on a single-family lot. They can be attached to the main house or be a separate structure, like a backyard cottage. ADUs provide flexible housing options for homeowners. They can be used for rental income or to house family members.
How do I find an ADU contractor in Kent?
Can I get an ADU quote for my property in Kent?
Are homes with mother-in-law suites available in Kent?
Also serving nearby: Renton · Federal Way · Bellevue · Tacoma · Seattle
More on this: HUD ADU resources — ADU policy and financing research.
Service area details
Serving all of Kent — population 133,378; about 3,942 residents per square mile across 33.8 sq mi. ZIP codes covered include 98030, 98031, 98032, 98035, 98042, 98064, 98089.
Neighborhoods served in Kent: East Hill, West Hill, Kent Valley, Covington, Lake Meridian — and every surrounding area.
Areas we serve
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