Showing ordinances that apply to Seneca Knolls, NY
Seneca Knolls is an unincorporated community (population 1,992) in Onondaga County, New York. Because Seneca Knolls is not an incorporated city, it does not have its own municipal code. Instead, Onondaga County ordinances apply directly to properties here. The adu rules rules below are the ones that govern your area.
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.
See how Seneca Knolls's adu rules rules stack up against other locations.
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