ADU rules in Onondaga County, NY — also called accessory dwelling unit regulations or granny flat ordinances — cover setbacks, owner-occupancy, parking, and permit requirements.
ADUs permitted under local zoning in Onondaga County. No statewide NY ADU preemption as of 2026. Town of DeWitt, Manlius, and Syracuse allow accessory apartments with a special use permit.
Syracuse allows accessory dwelling units in most R zones following 2022 zoning code update (Chapter XIV). Suburban towns require special permit from the zoning board, lot size minimums (typically 10,000 sq ft), and owner occupancy of primary or ADU. Building permit and certificate of occupancy required.
Contact your local code enforcement office for specific penalty information.
Onondaga County, NY
Commercial noise regulated by municipal codes. Syracuse zoning limits industrial noise at residential property lines to 65 dBA day, 55 dBA night.
Onondaga County, NY
Commercial vehicles over 10,000 lbs or bearing commercial signage are generally prohibited on residential streets overnight in Syracuse and most Onondaga Cou...
Onondaga County, NY
RV and boat parking regulated by town zoning codes. Most Onondaga County towns prohibit on-street RV parking over 24-48 hours and require side or rear yard s...
Onondaga County, NY
Street parking in Onondaga County follows NY Vehicle & Traffic Law plus local codes. City of Syracuse enforces odd-even street cleaning rules Nov 15-Apr 1 an...
Onondaga County, NY
Smoke and CO detectors required in all NY dwellings under 19 NYCRR Part 1225 (Uniform Code). Amanda's Law requires CO alarms in homes with fuel-burning appli...
Onondaga County, NY
Outdoor burning of brush, leaves, or debris is prohibited in Onondaga County from March 15 to May 15 under the NYSDEC statewide burn ban. Burning household t...
See how Onondaga County's adu rules rules stack up against other locations.
Help us keep this page accurate. If you notice an error or outdated information, let us know.