Accessory dwelling unit construction 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
The cost of building an ADU depends on your choice of materials, the square footage, and whether you are doing a garage conversion or a new detached build. Site access and utility upgrades also play a big role in the final bill. Exact pricing confirmed free on the call.
Frequently asked in Kent
How does property size affect ADU options in Kent?
Can I get an ADU quote for my property near Bellevue in Kent?
What is the general cost to build an ADU in Kent?
The cost to build an ADU in Kent varies based on size, design complexity, and materials. Site preparation, utility hookups, and permit fees also contribute. Local market conditions influence labor and material expenses. We provide free, detailed estimates tailored to your specific project. Contact us to get an accurate quote for your ADU.
Are there grants available for ADUs in Kent, Washington?
What are the typical ADU services offered by contractors in Kent?
Can I build a backyard ADU in Kent?
What kind of ADU housing is common 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, Des Moines — and every surrounding area.
Areas we serve
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