Accessory dwelling unit rental — Federal Way, WA
Last updated: September 24, 2026
What affects the price
Building an ADU involves several moving parts that shape your total investment. The final figure depends heavily on whether you choose a prefab unit or a custom build from the ground up. Site conditions are another major factor; if your property requires extensive grading, utility trenching, or foundation work, costs will climb. You also have to consider your choice of finishes, like high-end appliances or custom cabinetry. Navigating local permit fees and impact assessments also adds to the total.
About this service
This involves setting up a secondary unit on your property specifically to lease to tenants. You need this service if you are interested in generating monthly income while maintaining your property ownership. We focus on layouts that maximize tenant appeal and ensure privacy for both your main home and the rental unit.
Frequently asked in Federal Way
What are the costs involved in ADU construction in Federal Way?
Are there accessory dwelling unit grants available in Federal Way?
What is an ADU unit and how does it work in Federal Way?
What are the regulations for accessory dwelling units in Federal Way?
How do I find ADU builders near me in Federal Way?
What does 'accessory dwelling unit' mean in the context of Federal Way?
What is the cost of an accessory dwelling unit permit in Federal Way?
Also serving nearby: Tacoma · Kent · Renton · Seattle · Bellevue
More on this: HUD ADU resources — ADU policy and financing research.
Service area details
Serving all of Federal Way — population 97,701; about 4,375 residents per square mile across 22.3 sq mi. ZIP codes covered include 98003, 98023, 98063, 98093.
Neighborhoods served in Federal Way: Mirror Lake, The Springs, Woodmont, Star Lake — and every surrounding area.
Areas we serve
Browse by state, then city.