Accessory dwelling unit cost — 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
Pricing for an ADU is driven by the quality of finishes, the foundation type, and the complexity of your site’s terrain. Projects on flat, accessible lots are generally more affordable than those requiring significant grading or utility trenching. Exact pricing confirmed free on the call.
Frequently asked in Kent
What kind of accessory dwelling unit services are available in Kent?
How can I find a reputable adu builder in Kent?
What is the typical adu construction process in Kent?
What does 'accessory dwelling unit' actually mean in Kent?
Are there specific rules for accessory dwelling unit rentals in Kent?
What are the benefits of a modular accessory dwelling unit in Kent?
What is the meaning of 'accessory dwelling unit' in Washington State?
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, Northwest Kent, Covington, South Kent, Kent Valley — and every surrounding area.
Areas we serve
Browse by state, then city.