Westchester County, New York
Town of New Castle is a town in Westchester County, New York. Town of New Castle adopts its own zoning, so inside its limits Town of New Castle’s rules apply, not the county’s. Septic permits inside Town of New Castle come from Town of New Castle. 7 rules below are quoted from official sources and independently re-checked, most recently on October 23, 2026. Rules for unincorporated land are on the Westchester County page.
Land in the unincorporated area of the Town of New Castle, within the town's municipal limits.
“area of the Town of New Castle is hereby divided”
The unincorporated area of New Castle town.
“The unincorporated area of the Town of New Castle is hereby divided into the following classes of districts:”
Camping in parks under the jurisdiction of the New Castle Recreation and Parks Commission; this does not establish a rule for private land.
maximum stay: <= 2 nights (Only in the designated Whippoorwill Park area upon application and supervision.) · maximum participants: <= 30 participants (Only in the designated Whippoorwill Park area upon application and supervision.)
“only in the area designated in Whippoorwill Park only for no more than two nights with a maximum of 30 participants”
Any parcel in New Castle town relying on a separate sewage disposal or on-site wastewater treatment system.
minimum inspection frequency: per 5 years
“at a minimum frequency of once every five years.”
Regulated development in the Millwood Center Area Design Plan Overlay District inside New Castle town.
“Building Department shall refer said application”
Town of New Castle does not set these itself; the county, a health district or the state does, and they apply to every address inside its limits.
R-1A One-Family Residence District in the unincorporated area of New Castle town.
minimum lot area: 1 acre
“R-1A One-Family Residence District. Minimum lot area shall be one acre.”
We looked and could not find an official answer yet. Silence is not permission; ask Town of New Castle or Westchester County directly.
Each answer was extracted from an official source and independently re-checked against that source by a second reviewer. That is an evidence check, not legal advice. Rules change; confirm with the authority before you buy or build.
Unanswered questions are usually a sign that Town of New Castle publishes no rule on the point, not that none exists. Westchester County’s page lists the county offices to call.
Off-grid gear
Going off-grid in Town of New Castle means bringing your own water and power. The kit we’d start with:
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