Accessory Structures in Greenburgh, NY (2026)
4 verified accessory structures rules for Greenburgh, New York, sourced directly from the municipal code and official government pages.
Verified from official government sources
ADU Rules
Greenburgh allows one accessory dwelling unit per lot only in the R-5 through R-40 and PUD districts, and only after the Planning Board grants a special permit under Code § 285-36(O). Minimum lot sizes, unit-size caps and district conformance all apply before an ADU can be built.
Greenburgh Accessory Dwelling Unit Zoning Rules
Significant RestrictionsGreenburgh Code § 285-36(O), as added by Local Law No. 2-2026 (adopted April 8, 2026)
O. Accessory Dwelling Units. ADUs shall be permitted upon issuance of a special permit by the Planning Board and only in the following districts: R-5, R-7.5, R-10, R-15, R-20, R-30, R-40, and PUD. ADUs shall additionally be permitted upon the issuance of a special permit by the Planning Board in connection with new subdivision and site plan applications filed after the effective date of this lo...
ADU Owner Occupancy
Greenburgh requires the owner of any lot with an ADU to swear, under penalty of perjury, that they live in one of the dwelling units on the property, and the house, the ADU and the lot must stay under the same ownership at all times.
Greenburgh's ADU Owner-Occupancy Affidavit Rule
Significant RestrictionsGreenburgh Code § 285-36(O)(9), as added by Local Law No. 2-2026 (adopted April 8, 2026)
(9) Owner occupancy required. The owner(s) of the lot upon which the ADU is to be located shall submit a sworn affidavit certifying, under penalty of perjury, that they continuously reside in and occupy one of the dwelling units on said lot. The primary residence, the ADU, and the lot on which it is situated must be held in common ownership at all times.
ADU Rental Restrictions
Greenburgh bars owners from leasing an accessory dwelling unit for less than a full year, and if that lease breaks early, the owner cannot hand the remaining term off to a new tenant.
Greenburgh's One-Year ADU Lease Term Rule
Some RestrictionsGreenburgh Code § 285-36(O)(7), as added by Local Law No. 2-2026 (adopted April 8, 2026)
(7) Rental Duration. Property owners shall not lease an ADU for less than a one-year term, and in the event of a breach of the lease or termination prior to one year, the property owner shall not be permitted to assign the remainder of the lease term.
Garage Conversions
Converting a lawful garage or other accessory structure into an ADU in Greenburgh caps the unit at 800 square feet and 12 feet in height, though the Planning Board can waive the height cap for structures already taller if a waiver will not harm neighbors.
Greenburgh Garage-to-ADU Conversion Standards
Significant RestrictionsGreenburgh Code § 285-36(O)(3)(c), as added by Local Law No. 2-2026 (adopted April 8, 2026)
(3)(c) The maximum gross floor area shall not exceed 800 sq. ft. for ADUs contained within a detached structure. The maximum height of an ADU located within a detached accessory structure shall be 12 ft. Following receipt of a written recommendation from the Commissioner of the Department of Community Development and Conservation, the Planning Board may in its discretion grant a waiver of this ...
Looking for Westchester County county-wide rules?
County ordinances apply to unincorporated areas and may supplement Greenburgh city rules.
Accessory Structures in Westchester County →