Bolthole Index

Sullivan County, New Hampshire

Zoning, building permits and septic rules in Town of Cornish, New Hampshire

Town of Cornish is a town in Sullivan County, New Hampshire. Town of Cornish adopts its own zoning, so inside its limits Town of Cornish’s rules apply, not the county’s. Septic permits inside Town of Cornish come from the state health agency. 5 rules below are quoted from official sources and independently re-checked, most recently on October 29, 2026. Rules for unincorporated land are on the Sullivan County page.

Answers from the rulebook for Town of Cornish

Town of Cornish’s own rules

  • Building permitRequired

    Erection, relocation, or changed/extended use of structures or lots inside Cornish town.

    • Accessory farm buildings and structures not for human occupancy are excepted from the quoted zoning certificate-or-permit requirement.
    • A zoning permit is not required for remodeling or repair when the use is unchanged and the building is not enlarged or the use extended; the ordinance directs readers to the Cornish Building Code.
    • The building-permit form says a permit is void if construction is not undertaken within one year.
    “On or after the effective date of this Ordinance, it shall be unlawful to change the nature or extent of the use of any structure or lot, erect any structure, sign or building, or relocate any building (except an accessory farm building, or a structure not for human occupancy) in any district without first obtaining a certificate of compliance or a permit from the Administrator.”
  • Local zoningPresent (with conditions)

    Land inside Cornish town, New Hampshire.

    • The ordinance may be amended by Town Meeting vote using the RSA 675 procedure.
    “Pursuant to the authority conferred by RSA 672-677, and for the purpose of promoting the health, safety, convenience, and the general welfare of the Town of Cornish, the following Ordinance is hereby enacted by the voters of the Town of Cornish, New Hampshire.”
  • Manufactured homesLimited

    Manufactured houses inside Cornish town.

    • Manufactured houses are subject to the ordinance's provisions.
    • They are prohibited in the Non-Manufactured Housing Overlay District described in Article III.
    “Manufactured houses are allowed in all districts, subject to the provisions of this Ordinance, except in the Overlay District described in Article III.”
  • Who permits septicState (with conditions)

    Septic systems serving dwellings inside Cornish town.

    • The Town building-permit form identifies both Town-approved and State-approved septic-system fields.
    • Occupancy requires the State of New Hampshire Approval For Operation Certificate.
    “Dwellings must not be occupied unless the owner and the Selectmen have a copy of an Approval For Operation Certificate from the State of New Hampshire.”
  • Permit processPublished (with conditions)

    Zoning permits and certificates of compliance inside Cornish town.

    • The applicant may be required to notify owners of record of abutting parcels before issuance of a certificate of compliance.
    • The Administrator reviews the site and plans, maps, or diagrams and issues a certificate only if the use is permitted and the applicable fee is paid.
    • Any permit required after required authorization is issued upon payment of the applicable fee.
    “The Administrator shall view the area site of each proposed change or extension of the use of any lot or structure, and shall review any plans, maps, or diagrams describing the proposed used, and if such proposed use is permitted use under this Ordinance, he shall issue a certificate of compliance upon the payment of the applicable fee.”

Still unanswered

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

  • Owner-builder exemption — Owner-built residential work inside Cornish town.
  • Building code adopted — Construction inside Cornish town.
  • Inspections — Residential building inspections inside Cornish town.
  • Minimum dwelling size — Single-family dwellings inside Cornish town.
  • Building height — Residential buildings inside Cornish town.
11 more unanswered
  • Tiny homes
  • Accessory dwellings
  • Septic permit
  • Septic inspection
  • Off-grid sanitation
  • Well permit
  • Mandatory utility hookup
  • Agricultural exemption
  • Subdividing land
  • Driveway access
  • Short-term rentals

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 Cornish publishes no rule on the point, not that none exists. Sullivan County’s page lists the county offices to call.

Off-grid gear

Going off-grid in Town of Cornish means bringing your own water and power. The kit we’d start with:

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