Washington ADU Permit Fees & Cost Calculator
Washington, DC allows accessory dwelling units in many residential zones, but the official fee schedule for a typical ADU permit is not clear from the available official sources. DC official zoning and housing documents confirm ADU eligibility and income-related ADU programs, while permit-specific costs appear to depend on the project and must be verified with DC permitting and utility agencies.[2][8]
Free ADU fee calculator
Estimate local ADU fees
Step 1 of 5: Location
The calculator uses staged city data from the ADUFee database with visible confidence levels and dated source tracking.
Fee overview
The available official sources confirm ADU-related zoning and IZ program rules, but not a clear ADU permit fee schedule.
Secondary-source fee estimates should be verified with DC permitting authorities and DC Water before budgeting.
Washington, DC is not a California city, so no California ADU impact-fee baseline applies.
The requested ADU is a standard residential accessory dwelling unit in Washington, DC, not an income-restricted Inclusionary Zoning ADU unless otherwise specified.
Official permit-fee amounts were not available in the provided sources, so numeric fee fields are left null unless directly supported.
Washington fee estimates should be verified against the current city, utility, and school district fee schedules before filing.
FAQs
Are Washington ADU fee estimates official?
No. ADUFee.com provides planning estimates only. Final fees are set by the city, utility providers, school district, and other agencies.
What sources are used for Washington?
The database stores city, state, utility, school, county, and other source links where available. Each estimate should still be verified locally.
Can ADU fees vary within District of Columbia?
Yes. Permit, utility, school, inspection, and impact fees can vary by jurisdiction, parcel, project size, utility provider, and local interpretation.