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

At a glance

Building permit

Required for covered work; administered by the local city, town or village¹²

Zoning

No county zoning; rules vary by city, town or village³²

Septic (OWTS) permit

Required for new systems, most repairs and listed tank or chamber work⁶⁷

Manufactured-home owner-installer

An owner-occupant may apply for installer certification; a certified installer must supervise installation⁸

OWTS permit fees

$475 for new construction or conversion; $335 for replacement systems⁹

Building code in effect

NY Uniform Code and Energy Code; the 2025 edition applies to applications from December 31, 2025 on¹⁰

Small accessory structure exemption

Detached sheds and similar structures up to 144 sq ft are commonly exempt from a permit¹¹

Who to call

Contact details are copied from each office’s official page and were checked against it on October 9, 2026.

Do you need a building permit in Tompkins County, New York?

Yes. Work in Tompkins County that must conform to New York's Uniform Code requires a building permit, subject to permitted exceptions, and the city, town or village with jurisdiction normally administers it¹². The Town of Danby shows how the local system works: its code office enforces local and state rules, and certain projects require a building permit¹². A local code-enforcement program may exempt listed work, including a qualifying one-story detached shed, playhouse or similar accessory structure no larger than 144 square feet, but an exemption does not waive the underlying codes¹¹. The 2025 New York Uniform Code applies to building-permit applications submitted beginning December 31, 2025¹⁰. Danby has also adopted the NYStretch Energy Code, so confirm both statewide and local requirements with the municipality before designing the project¹².

Who issues building permits in Tompkins County, New York?

First identify the city, town or village containing the parcel, because municipalities administer building permits, code enforcement, planning and zoning approval in Tompkins County². Septic permits do not move to the municipality: Tompkins County Environmental Health issues them⁴. For land in Danby, the Town of Danby Code Enforcement Office can be reached at 607-277-4788 or code@danby.ny.gov¹². Owners elsewhere should contact their own municipality rather than treating Danby's requirements as countywide². In Dryden, a zoning permit is not a construction permit; after zoning approval, the applicant must submit the construction applications and other required agency permits before a construction permit can issue¹³. Dryden charges no zoning-permit fee for new construction on improved land, $25 on unimproved vacant land, and another $165 when an area or setback variance is required¹⁴. Fees and procedures elsewhere may differ, so request the current forms from the parcel's local code office².

Does Tompkins County, New York have zoning?

Tompkins County does not administer countywide zoning; land-use authority rests with its cities, towns and villages³. The county therefore sets no county-level minimum dwelling size or setback, but the applicable municipality may impose both, along with rules for RVs and tiny homes¹⁵¹⁶². Dryden illustrates why parcel location matters: lots there created after September 1969 must have at least 30,000 square feet and 125 contiguous feet of public-road frontage, while Tompkins County Environmental Health determines lot size where private septic and wells are needed¹⁷. Those Dryden dimensions are not countywide rules¹⁷. Tompkins County reviews certain locally referred zoning actions before municipal action, but that review does not replace local approval¹⁸.

Who issues septic (OWTS) permits in Tompkins County, New York?

Tompkins County Environmental Health requires an OWTS construction permit before a new system, most repairs or replacement of an existing system¹⁹. A permit is also required before installing or replacing a septic tank, pump chamber or holding tank, and county staff design most systems during permitting²⁰⁶. The 2026 fee schedule charges $475 for new construction or conversion, $335 for a replacement system, and $110 for septic-tank or pump-chamber replacement⁹. The Health Department must inspect a permitted system before it is covered, and the construction permit must remain on-site during construction and inspection²¹. A lot generally needs at least one acre of usable area that can contain a 150-foot-diameter circle, although qualifying older lots of at least 30,000 square feet may be considered⁵. Only about 3.7% of county soils are rated without severe limitations for a conventional drain field, so settle septic feasibility before fixing the house location²².

Can you live in an RV or tiny home on your land in Tompkins County?

Tompkins County itself has no land-use rule restricting RV or tiny-home occupancy, but that does not make either use automatically legal: the applicable city, town or village may restrict it²³²⁴. Ask the local code office whether full-time occupancy, temporary camping and the proposed dwelling type are allowed on the parcel². New York's possible permit exemption for a qualifying detached accessory structure no larger than 144 square feet applies to sheds, playhouses and similar uses; it does not establish permission to occupy a small structure as a home¹¹. Installing, altering or repairing a manufactured home requires a building permit²⁵. A manufactured-home owner-occupant who wants to perform installation work may apply for installer certification, but a certified installer must be on site and must supervise and certify any component the owner completes⁸.

Building a home in Tompkins County, New York: the steps, in order

1. Identify the city, town or village containing the parcel, then confirm the zoning district, proposed use, setbacks and local application requirements with its code office².
2. If the site lacks municipal sewer, apply to Tompkins County Environmental Health for an OWTS permit before fixing the house location⁴.
3. If work is within 25 feet of a county-highway centerline, obtain the county permit; installation or replacement of a driveway entrance is permit work²⁶.
4. Check the flood map; development in a mapped flood zone needs a separate permit from the local municipality²⁷.
5. Submit the local building-permit application and all required construction documents²⁸.
6. Keep permitted building work accessible and exposed until the municipality inspects and accepts it, and leave the OWTS uncovered until the Health Department inspection²⁹³⁰.
7. Obtain a certificate of occupancy or compliance for work that required a building permit or changed the general occupancy classification³¹.

What should you check before buying land in Tompkins County, New York?

Confirm the parcel's municipality before relying on zoning or building-permit information, because those decisions are administered locally². Check septic feasibility before closing: only about 3.7% of Tompkins County soils are rated without severe limits for a conventional drain field, while the county generally requires at least one acre of usable land shaped to fit a 150-foot-diameter circle²²⁵. Check mapped flood status too, because buildings, grading, filling, paving and excavation in a flood zone require a separate permit from the applicable municipality³². For property on a county highway, work within 25 feet of the centerline requires a county permit, including installation or replacement of a driveway entrance; regular owner maintenance and repairs do not²⁶. Ask whether a proposed lot split triggers municipal plat review and county Environmental Health review³³³⁴. We could not confirm a countywide private-well permit rule, so ask Tompkins County Environmental Health before closing. Budget for an effective property-tax rate of about 2.3% and a median annual property-tax bill near $6,374³⁵³⁶.

Watch-outs

• Building permits and zoning decisions in Tompkins County are administered by the applicable city, town or village, so confirm the parcel's municipality before applying².
• Only about 3.7% of Tompkins County soils are rated without severe limits for a conventional drain field, and the county generally requires at least one acre of properly shaped usable land for an OWTS permit²²⁵.
• Work within 25 feet of a Tompkins County highway centerline requires a county permit, including installation or replacement of a driveway entrance²⁶.
• Development in a mapped flood zone requires a separate floodplain development permit from the applicable municipality, even when other permits are already required²⁷.

Sources

1. NYS Uniform Fire Prevention and Building Code: What Elected Officials Need to Know, quoted and re-checked
2. Email Planning and Sustainability Department | Tompkins County, quoted and re-checked
3. Email Planning and Sustainability Department | Tompkins County, quoted and re-checked
4. Onsite Wastewater Treatment Systems (OWTS), quoted and re-checked
5. Tompkins County Whole Health — Environmental Health (OWTS) (tompkinscountyny.gov)
6. Onsite Wastewater Treatment Systems (OWTS), quoted and re-checked
7. Onsite Wastewater Treatment Systems (OWTS), quoted and re-checked
8. Division of Building Standards and Codes Frequently Asked Questions, quoted and re-checked
9. Environmental Health Division 2026 Water System Operating, On-Site Wastewater Treatment & Development Fees, quoted and re-checked
10. NYS Uniform Fire Prevention and Building Code: What Elected Officials Need to Know, quoted and re-checked
11. Part 1203 Uniform Code and the Energy Code: Minimum Standards for Administration and Enforcement (New York statewide rule), quoted and re-checked
12. Town of Danby Code Enforcement Office (danby.ny.gov)
13. Zoning Permit Application, quoted and re-checked
14. Zoning Permit Application, quoted and re-checked
15. Email Planning and Sustainability Department | Tompkins County, quoted and re-checked
16. Email Planning and Sustainability Department | Tompkins County, quoted and re-checked
17. Zoning Permit Application, quoted and re-checked
18. Community Planning, quoted and re-checked
19. Onsite Wastewater Treatment Systems (OWTS), quoted and re-checked
20. Onsite Wastewater Treatment Systems (OWTS), quoted and re-checked
21. OWTS Details & Specifications, quoted and re-checked
22. Share of soils USDA rates "not limited" for a conventional septic drain field (SSURGO). A strict rating: the median county is about 6% and a tenth of counties are 0%, so a low figure means most lots need a site evaluation or an engineered system, not that septic is impossible. Cite it only with that caveat: Bolthole Index county data
23. Email Planning and Sustainability Department | Tompkins County, quoted and re-checked
24. Email Planning and Sustainability Department | Tompkins County, quoted and re-checked
25. Division of Building Standards and Codes Frequently Asked Questions, quoted and re-checked
26. Construction and Hauling Permits, quoted and re-checked
27. FEMA and DEC Flood Map Update FAQs, quoted and re-checked
28. Administration and Enforcement of the Uniform Code (New York statewide rule), quoted and re-checked
29. Legal Memorandum LG03: NYS Uniform Fire Prevention and Building Code, quoted and re-checked
30. OWTS Details & Specifications, quoted and re-checked
31. Legal Memorandum LG03: NYS Uniform Fire Prevention and Building Code, quoted and re-checked
32. FEMA and DEC Flood Map Update FAQs, quoted and re-checked
33. Environmental Health Division 2026 Water System Operating, On-Site Wastewater Treatment & Development Fees, quoted and re-checked
34. New York Town Law § 276: Subdivision review; approval of plats; development of filed plats (New York statewide rule), quoted and re-checked
35. Effective property tax rate: Bolthole Index county data
36. Median property tax bill: Bolthole Index county data

Written October 9, 2026 from the rules quoted below, each taken from an official source and re-checked by an independent reviewer. This is research, not legal advice: rules change, so confirm with the office before you buy or build.