Buying Land in Delaware County, New York

Government: a Board of Supervisors from Delhi

Delaware County is governed by a Board of Supervisors, based in Delhi, the county seat. County government handles health and septic permitting (subject to the added DEP layer described below), the county clerk's recording office, and real property tax services countywide, while zoning and building-permit authority sits with each of the county's individual towns.

At the heart of the NYC water supply: the Cannonsville and Pepacton watersheds

Delaware County is a core part of New York City's Catskill/Delaware water supply system, which delivers roughly 90% of NYC's drinking water. The Cannonsville Reservoir's entire drainage basin -- spanning 17 towns -- sits within Delaware County, and the Pepacton Reservoir's basin also covers a substantial part of the county (extending into neighboring Ulster and Greene Counties). That means a large share of Delaware County land sits inside NYC's legally defined watershed, subject to the NYC Department of Environmental Protection's (DEP) Watershed Rules and Regulations on top of standard county and town land-use rules.

The scale of NYC's actual land presence here is worth understanding concretely, not just as a regulatory abstraction: NYC's DEP has spent decades buying land outright and purchasing conservation easements from private landowners across the watershed under a state-authorized, roughly 105,000-acre-plus acquisition program, and controls close to 30% of the land area within the watershed portion of Delaware County today. That means a meaningful share of the land near any given Delaware County parcel may already be DEP-owned or DEP-easement-encumbered -- worth checking directly with the county's Watershed Affairs office or DEP's own program, and developed in full on our dedicated conservation-easements page for Delaware County.

Septic permitting: DEP reviews directly here, unlike some neighboring watershed counties

For a parcel in the NYC watershed, DEP requires its own septic approval before subdivision or construction can proceed, and a building permit will not be issued without that DEP approval -- on top of, or in some cases effectively replacing, the standard county health department review under Appendix 75-A described on our New York state page. Unlike Putnam, Ulster, and Westchester Counties, which have signed delegation agreements letting their county health departments approve septic plans on DEP's behalf, Delaware County has no such agreement: septic plans here go to DEP's own regional office directly, on DEP's own statutory review clock, a genuinely different process worth understanding before assuming a timeline based on a delegated-county comparison.

Beyond the watershed: a genuinely rural Catskills land base

It's worth not letting the watershed overlay overshadow the rest of the picture: Delaware County is one of the largest counties in the Catskills by land area, with real working dairy and livestock farms, extensive state forest and wild-forest land, and a hunting and second-home camp culture that predates the watershed program by generations. The county's hilly, forested terrain and relatively low land prices compared to more easterly Hudson Valley counties continue to draw buyers looking for acreage rather than a manicured suburban lot, and much of that market -- particularly land outside the delineated watershed basin -- functions under the standard New York pattern of town zoning and county-level septic review with no DEP layer at all.