Building permits, zoning and land rules in Onondaga County, New York

Yes. Building permits are required in Onondaga County for work that must conform to New York's Uniform Code, although the local code-enforcement program may allow specified exceptions¹. Building permit applications must comply with the 2025 Uniform Code as of December 31, 2025; enforcement of its provisions prohibiting fossil-fuel equipment and building systems in new buildings remains suspended by court order⁹. As one local example, the Town of Onondaga warns that starting work that requires a permit before obtaining one is a Class A misdemeanor¹⁰. New York permits a local program to exempt a one-story detached tool or storage shed of 144 square feet or less, but the local authority may instead require a permit⁴. Ask the code office for the city, town or village containing the parcel before starting work².

The applicable local code office typically administers building permits, so first identify the city, town or village containing the parcel^1,2. The Town of Onondaga's Building and Codes Department is one municipal example, at 5020 Ball Road, Syracuse, NY 13215¹⁰. Its published process calls for a complete application, survey, plans, ownership and insurance documents where applicable, fees, and driveway and septic approvals where applicable; inspections must be scheduled in advance¹¹. Building-permit fees vary by municipality, and the Town of Onondaga's schedule is not countywide¹¹. Onondaga County separately publishes Environmental Health fees, but those are not a countywide building-permit fee schedule¹². For septic questions, contact the Bureau of Public Health Engineering at (315) 435-6600 or pheseptic@ongov.net³.

Onondaga County parcels are governed by the land-use controls of the city, town or village in which they lie². The Town of Onondaga, for example, publishes its own zoning code and map, but those rules do not apply elsewhere in the county¹³. The county's role is advisory: the County Planning Board advises local boards on inter-municipal impacts, and the Department of Planning supports municipalities¹⁴. Ask the parcel's municipal code office about allowed uses, setbacks, lot size and accessory structures rather than applying another municipality's rules. Subdivision review starts with the local village, town or city, and the County Health Department must review and stamp every subdivision map filed with the County Clerk¹⁴. Public-road frontage also requires review by the road owner, and subdivisions within three miles of Syracuse receive extra-territorial review¹⁴.

The Onondaga County Health Department handles individual sewage-disposal systems and related environmental-health review, coordinating with WEP Plumbing Control and local code officials³. Its published permit-to-construct application is expressly limited to the Skaneateles Lake and Otisco Lake watersheds³. For a newly proposed subdivision lot under 5 acres that cannot connect to public sewer, private sewage-disposal plans need Bureau approval before subdivision approval³. Ask the Bureau which application and review path applies outside those situations. A system discharging less than 1,000 gallons per day of ordinary sewage to groundwater, with no industrial or other non-sewage waste, does not need a state SPDES permit, but health-department approval may still apply⁶. Only about 18% of county soils avoid severe limits for a conventional drain field, so resolve septic feasibility before fixing the house site⁸.

We could not confirm a countywide rule for residential RV use, temporary camping, tiny-home occupancy or minimum dwelling size in Onondaga County. Ask the building and zoning office for the city, town or village containing the parcel, because land-use controls are municipal². As one local example, the Town of Onondaga allows a tiny house of 400 square feet or less, excluding lofts, in the districts its code names, if it sits on a permanent foundation without wheels and meets the Uniform Code; that rule does not apply in other municipalities¹⁵. A tiny or manufactured home involving work covered by the Uniform Code still follows the local building-permit process¹. Required construction inspections can include manufactured-home components and a final inspection, and permitted work must remain accessible until accepted¹. A certificate of occupancy or compliance is required before occupying work that required a building permit and when the general occupancy classification changes¹.

1. Identify the city, town or village containing the parcel and ask its code office to confirm zoning, fees and permit requirements^1,2.
2. Ask the Onondaga County Health Department at (315) 435-6600 which septic review applies; the county construction application is limited to the Skaneateles Lake and Otisco Lake watersheds, with separate review for certain subdivision lots³.
3. If connecting a new sewer lateral or reusing one, complete Capacity Assurance review before Health Department approval and a WEP Plumbing Control permit; review feedback or approval is provided within 45 days after submission⁷.
4. Submit the local building-permit package; state minimums include the work location and scope, tax-map number, occupancy classification and acceptable construction documents¹⁶.
5. An owner-occupant seeking to do permitted plumbing work in a single-family home must submit the homeowner statement and review form in person⁵.
6. Keep permitted work exposed for required inspections, then obtain a certificate of occupancy or compliance before occupancy¹.

Septic soils need real attention: only about 18% of Onondaga County land is rated free of severe limits for a conventional drain field, so arrange a site evaluation before committing to a house location⁸. If public sewer serves the parcel, a new or reused lateral requires Capacity Assurance review before county approval and a WEP Plumbing Control permit⁷. The county is about 61.4% wooded, while about 86.8% of its land has slopes of 15% or less⁸. Confirm municipal zoning, access and floodplain constraints for the specific parcel because the reviewed material does not establish countywide driveway or floodplain rules. We also could not confirm a general private-well permit requirement, so ask the County Health Department what review applies. Property taxes average about 2.6% effectively, with a median bill around $4,805 a year, while farmland is valued around $3,467 an acre⁸.