Bolthole Index

Westchester County, New York

Zoning, building permits and septic rules in Town of New Castle, 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.

Answers from the rulebook for Town of New Castle

Town of New Castle’s own rules

  • Local zoningPresent (with conditions)

    Land in the unincorporated area of the Town of New Castle, within the town's municipal limits.

    • Chapter 60 was adopted by the Town Board and has amendments noted where applicable.
    “area of the Town of New Castle is hereby divided”
  • Zoning districtsPublished (with conditions)

    The unincorporated area of New Castle town.

    • The Zoning Map is adopted as part of Chapter 60 and is located in the Town Clerk's office according to § 60-310.
    “The unincorporated area of the Town of New Castle is hereby divided into the following classes of districts:”
  • Camping on your landLimited

    Camping in parks under the jurisdiction of the New Castle Recreation and Parks Commission; this does not establish a rule for private land.

    • Camping requires application to the Commission.
    • Permitted camping is only in a designated area of Whippoorwill Park.
    • It is limited to two nights and 30 participants.
    • Camping must be supervised by the Commission, a Commission member, or a park official.
    • Overnight camping is not permitted in other Commission-jurisdiction parks.

    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”
  • Who permits septicLocal (with conditions)

    Inspection and maintenance regulation of separate sewage disposal and on-site wastewater systems serving parcels in New Castle town.

    • The town ordinance implements New York State DEC MS4-permit requirements.
    • A septage collector is licensed by the Westchester County Department of Health under cited County Sanitary Code provisions.
    • Compliance with Chapter 102A is not compliance or approval under other laws, including Article VIII of the Westchester County Sanitary Code.
    “the Town implement and enforce a program”
  • Septic inspectionRequired

    Any parcel in New Castle town relying on a separate sewage disposal or on-site wastewater treatment system.

    • Requirement began May 1, 2011.
    • The owner must retain the inspection record for at least six years.
    • The appeals authority may extend the time to comply by no more than 180 days, but may not grant a waiver or exemption.

    minimum inspection frequency: per 5 years

    “at a minimum frequency of once every five years.”
  • Permit processPartial

    Regulated development in the Millwood Center Area Design Plan Overlay District inside New Castle town.

    • This claim concerns the overlay-district process only and does not establish the general building-permit process.
    • New construction also requires review and approval by the Board of Architectural Review.
    “Building Department shall refer said application”

Rules another office applies inside Town of New Castle

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.

  • Minimum lot sizeSpecified

    R-1A One-Family Residence District in the unincorporated area of New Castle town.

    • The cited classes-of-districts provision applies to the unincorporated area of the Town of New Castle.

    minimum lot area: 1 acre

    “R-1A One-Family Residence District. Minimum lot area shall be one acre.”

Still unanswered

We looked and could not find an official answer yet. Silence is not permission; ask Town of New Castle or Westchester County directly.

  • Building permit — New residential construction inside New Castle town.
  • Owner-builder exemption — Owner-builder work inside New Castle town.
  • Building code adopted — Building-code adoption for construction inside New Castle town.
  • Inspections — Building inspections for construction inside New Castle town.
  • Certificate of occupancy — Certificates of occupancy for buildings inside New Castle town.
18 more unanswered
  • Minimum dwelling size
  • Setbacks
  • Lot coverage
  • Building height
  • Living in an RV
  • Tiny homes
  • Manufactured homes
  • Accessory dwellings
  • Septic permit
  • Off-grid sanitation
  • Well permit
  • Mandatory utility hookup
  • Agricultural exemption
  • Subdividing land
  • Driveway access
  • Building in a floodplain
  • Short-term rentals
  • Permit fees

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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