Edison, NJ Accessory Structures: ADU Impact Fees (2026)

There is no Edison ADU impact fee on the books because Edison does not have an ADU-specific permitting framework. The fees that an Edison ADU applicant should plan for are: (1) Zoning Board of Adjustment use-variance application fee and escrow deposit - the application fee is set by the Township fee schedule (typically several hundred dollars) and the escrow covers Township professional review (planner, engineer, attorney) with unused funds refunded at the close of the file. (2) NJ Uniform Construction Code subcode permit fees - building, electrical, plumbing, and fire-protection fees under the Edison fee schedule, calculated by estimated cost of construction or by fixture/device count under N.J.A.C. 5:23. (3) Township residential development fee under Edison's Affordable Housing Trust Fund ordinance, adopted pursuant to N.J.S.A. 52:27D-329.2 and the NJ DCA Council on Affordable Housing (COAH) framework - residential development fees are typically 1.5% of equalized assessed value of new construction, paid at certificate of occupancy, with exemptions for small additions. The statewide non-residential development fee of 2.5% authorized by N.J.S.A. 52:27D-329.2 does NOT apply to a residential ADU because the unit is residential, not non-residential. Sewer-connection fees from Middlesex County Utilities Authority may apply if the ADU has separate sanitary service, and Middlesex Water Company connection fees may apply where the ADU adds a new service line. Applicants should request a fee estimate from the Construction Code Official before filing.