ADU rules in Glen Cove, NY — also called accessory dwelling unit regulations or granny flat ordinances — cover setbacks, owner-occupancy, parking, and permit requirements.
Glen Cove's Chapter 280 does not authorize accessory dwelling units (ADUs) as-of-right. The city's residence districts allow only one principal dwelling per lot, with accessory uses limited to garages, sheds, pools, playhouses and similar non-habitable structures.
Glen Cove does not have a freestanding ADU ordinance. Two-family use is permitted only in specifically zoned R-2 and higher-density districts and only on lots meeting minimum dimensions in Article XIII. Any expansion of a single-family home into a two-family configuration requires a variance from the Board of Zoning Appeals and compliance with the city's Landlord Registry under § 168-65 if non-owner-occupied. New York State's 2024 statewide ADU enabling discussions have not been adopted by Glen Cove as of mid-2026. Detached garages and similar accessory structures cannot be converted to dwelling use without rezoning/variance.
Operating an unauthorized ADU is a Chapter 280 zoning violation enforceable under § 1-15 (up to $1,000 / 15 days per day). The city can also order the unit decommissioned and pursue civil action.
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