Brooklyn ADU Permit Fees & Cost Calculator
Brooklyn is in New York City, so ADU-related fees are generally set by NYC DOB/HPD rules rather than borough-specific schedules. The clearest official fee found is the Plus One ADU program’s $200 non-refundable application fee; other permit, plan review, inspection, and utility costs were not stated clearly in the official sources reviewed and should be verified directly with NYC agencies.
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
No borough-specific Brooklyn ADU fee schedule was found in the official sources reviewed.
The only explicit fee identified was the Plus One ADU program application fee; this is not the same as all permit or utility costs.
Some ADU costs may be embedded in broader NYC DOB, HPD, or utility processes and require direct verification with the relevant agency.
Brooklyn fee data should be treated as New York City fee data because Brooklyn does not have a separate municipal ADU permitting authority.
ADU fees may vary by project type, filing path, and whether the unit is new construction, conversion, or legalization.
Only official-source fee amounts were included; unverified third-party estimates were excluded.
FAQs
Are Brooklyn 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 Brooklyn?
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 New York?
Yes. Permit, utility, school, inspection, and impact fees can vary by jurisdiction, parcel, project size, utility provider, and local interpretation.