Building permits, zoning and septic rules in Cheshire County, New Hampshire

Cheshire County has no county building department, but a building permit is still required almost everywhere in New Hampshire before new construction begins: state law puts a duty on the person responsible for construction to obtain a permit before starting covered work^2,9. Most Cheshire County towns enforce that requirement locally, through their own building or code office, following whatever process that town has adopted⁹. Once an application is complete, the building official must approve or deny an ordinary application within 30 days; the deadline is 60 days for a nonresidential application or a residential project encompassing more than 10 dwelling units⁹. In a town that has not adopted its own enforcement mechanism, the state fire marshal runs a state building permit system instead, though that state-run system does not cover an ordinary one- or two-family home; ask your town clerk who currently issues residential permits if your town has no building office⁹. Every Cheshire County building must meet the state building code, which is built on the 2024 International Residential Code and International Building Code¹⁰. A town cannot issue a permit for work that would violate its zoning ordinance, the building code or planning-board regulations¹¹. A residence occupied by the owner and the owner's immediate family is exempt from the town's local enforcement mechanism unless the premises pose a clear and imminent danger to people other than the occupants, but that provision is not stated as an exemption from the state building code itself, so ask your town's building office before assuming no permit is needed⁵. Keene, the county seat and Cheshire County's largest city, is a worked example: its Building Safety staff reviews, approves, issues and inspects all construction in the city, including structural, electrical, plumbing, mechanical, accessibility, energy-efficiency and floodplain-development work³.

Cheshire County itself runs no zoning, planning or building department; its own list of county departments covers things like the sheriff, registry of deeds, corrections and human services, not land use¹. Zoning and building permits are a municipal function everywhere in New Hampshire, so the office you need depends entirely on which of Cheshire County's towns your land sits in¹. In Keene, that office is the Community Development Department, which runs both Building Safety and Planning & Zoning out of one office, reachable by phone or email^3,12. If your land is in one of the county's smaller towns, start with that town's own town hall or select board office instead of Keene's, since each town sets and enforces its own rules¹.

No: Cheshire County has no zoning ordinance and no planning department, and it exercises no zoning authority over any land in the county¹. Zoning in New Hampshire is set town by town, and a town's planning board only regulates subdivision of land if that town has specifically authorized the planning board to do so by ordinance or resolution¹³. Even a farm or ranch building is not automatically exempt from a town's dimensional standards, setbacks, driveway rules or similar requirements; New Hampshire law lets a local board grant a waiver for an agricultural use only after notice and a hearing, and only to the extent needed to reasonably permit that use¹⁴. Because rules genuinely differ from one Cheshire County town to the next, confirm your specific parcel's zoning district and any subdivision requirements with that town's own office, such as Keene's Planning & Zoning staff for property inside the city¹².

Septic permits in Cheshire County go through the state, not the county or even the town: the New Hampshire Department of Environmental Services requires prior approval of plans before anyone builds a structure that will discharge sewage or constructs a septic system^4,15. You need both an approval for construction and an approval for operation before you can use a new system, and locally approved plans must also be submitted where a town planning board or other local body requires them^4,16. Soil is a real constraint here: only 10.9% of Cheshire County's soil rates free of severe limits for a conventional septic drain field in the USDA's survey, so budget for a site evaluation and the possibility of an engineered system on much of the county's land⁸. Some towns require local approval of water-supply and sewage-disposal plans before you apply to NHDES, so ask the town first¹⁷. On developed waterfront property with any part of the septic system within 250 feet of the reference line, the buyer must obtain a septic evaluation from a New Hampshire licensed evaluator before the transfer, unless the buyer replaces or repairs the system within 180 days and gives the required notices¹⁸. If a public sewer is within 100 feet of your building, state law requires connecting to it instead of using a septic system¹⁹.

New Hampshire's recreational-campground law governs RVs at licensed, regulated campgrounds and camping parks, where a site is for temporary recreational occupancy only, not year-round residency, unless that site meets the same construction standards as a single-family house⁶. Outside a licensed campground, the same law lets a landowner host an RV on their own parcel for occasional use of no more than 7 days in a calendar year, but only after filing a statement of compliance with the town's governing body within 7 days before that use⁶. Neither provision creates a general right to live in an RV on ordinary land year-round; that question depends on your specific town's zoning ordinance, so confirm it with your town's planning or zoning office before you buy¹. A composting or incinerator toilet needs no state sign-off if the structure has no internal plumbing and no supplied water service, which is worth knowing if you are building a simple cabin without a well or septic system²⁰.

A driveway, entrance or approach onto a New Hampshire state highway needs a written permit from the state Commissioner of Transportation before construction or alteration begins⁷. If 400 feet of all-season safe sight distance cannot be obtained in both directions, no more than one access to the parcel may be permitted, and a qualifying residential application gets a decision within 60 days⁷. A driveway onto a town road is a different question: the town's own road agent or select board sets that process, and we could not confirm it for any Cheshire County town, so ask the town office before you clear a drive.

1. Contact your specific town's building or code office (or the Community Development Department if you're in Keene) to confirm local zoning, setbacks and the permit process before you design¹².
2. If your lot needs a septic system, get your design approved by the New Hampshire Department of Environmental Services and obtain a construction approval before building starts^4,15.
3. Apply for your building permit through your town's building office if it has adopted its own enforcement mechanism; otherwise check with your town clerk about the state fire marshal's building permit system⁹. A building official must approve or deny a completed ordinary application within 30 days, while a nonresidential application or residential project encompassing more than 10 dwelling units has a 60-day decision deadline⁹.
4. If the driveway meets a state highway, get the state driveway permit before construction⁷.
5. Build to the state building code and request the required inspections as work proceeds, including before any work is concealed²¹.
6. Get your septic system's approval for operation from NHDES before you use it, in addition to the earlier construction approval⁴.
7. Close out with a certificate of occupancy where your town requires one, after final inspections confirm the work meets state and local codes²¹.

Confirm which town your parcel sits in and call that town's office directly, since Cheshire County itself sets none of the zoning, building or subdivision rules that will govern your land¹. Test the soil before you count on a simple septic system: with only 10.9% of the county's soil rated free of severe limits for a conventional drain field, many lots will need an engineered system and a New Hampshire Department of Environmental Services site evaluation⁸. If you plan to drill a well, know that the contractor must file a completion record with the state within 90 days, so ask for a copy for your own records²². Property taxes run well above the national norm here: the effective rate is about 2.3% of assessed value, producing a typical annual bill near $5,968, so factor that into any purchase⁸. Homeowners insurance is comparatively affordable, with a typical policy near $1,375 a year⁸.