Building permits, zoning and land rules in Grafton County, New Hampshire

Before starting covered construction in Grafton County, the responsible person must obtain a building permit; where a municipality has adopted building-code enforcement, the application follows its local process¹. New Hampshire's building code applies in every municipality, and buildings and structures must comply with the state building and fire codes^2,11. The code in effect when the building-permit application is received remains applicable for the duration of the permitted work¹¹. Where local enforcement exists, the municipal building official performs inspections needed for code compliance; the inspection schedule is not uniform countywide¹¹. A municipality may require a certificate of occupancy before use of a new, remodeled or changed-use building^8,11. The owner-occupied family-residence exception concerns the local enforcement-agency provision, so do not treat owner-building as a blanket waiver of zoning, septic or other requirements⁸.

Start with the parcel's town office to identify the local building-permit process; where local enforcement is absent, the state building-permit system covers qualifying buildings other than one- and two-family dwellings^1,12. The State Fire Marshal accepts state building-permit applications, while septic design and construction approvals remain with New Hampshire DES^5,13. Local building-permit, inspection and occupancy fees depend on the municipality's fee schedule⁸. Ashland's published residential application lists $100 plus $0.15 per square foot for a new single-family home and $50 plus $0.15 per square foot for alterations or repairs; confirm the current schedule with the town before applying¹⁴. The state program's new-commercial-building fee is $0.30 per gross square foot, with separate electrical, plumbing, mechanical and fire-protection permits required¹². Under the statutory deadline, a completed building-permit application must be approved or denied within 30 days, or 60 days for nonresidential applications or residential applications encompassing more than 10 dwelling units¹.

Grafton County has no countywide zoning; municipal ordinances determine local land uses and dimensional requirements^3,4. Lebanon administers its own zoning ordinance and map; Lebanon properties with septic systems still need New Hampshire DES approval for operation before a certificate of occupancy may issue^15,16. The state planning office's village-district directory is incomplete, so obtain the parcel's current municipal ordinance and map¹⁷. In Ashland's Rural Residential district, the listed minimum lot is 40,000 square feet, with a 35-foot front setback and 25-foot side and rear setbacks; overlay rules and the soils-and-slopes formula for lots without town sewer also apply¹⁸. New Hampshire law requires municipalities with zoning to allow an attached or detached ADU as of right in districts permitting single-family dwellings, subject to applicable building, water and sewage requirements; ask Ashland's zoning office how its older ADU approval provisions now apply^18,19. Municipal planning boards may regulate subdivisions where authorized locally, including street improvements and utility plans; proposed subdivisions served by individual septic systems also fall under state sewage-disposal rules^20,21.

New Hampshire DES is the septic approval authority for Grafton County, although local water-supply and sewage-disposal requirements may also apply⁵. A new building that will discharge sewage and a new waste-disposal system need DES approval of the plans before construction; local-compliance certification also applies where the municipality requires prior local approval⁵. The system cannot be covered or placed in operation before final inspection and approval, and the installer or qualifying homeowner remains responsible for construction oversight²¹. Only about 5.9% of Grafton County soils lack severe limitations for a conventional drain field, so arrange a site evaluation before committing to a house location or price²². The Subsurface Systems Bureau reviews designs and issues construction and operation approvals²³.

We could not confirm a countywide rule allowing long-term RV occupancy on private land in Grafton County; ask the parcel's town about RV zoning and occupancy and New Hampshire DES about septic requirements^4,5. New Hampshire's campground rule concerns temporary recreational occupancy in campgrounds and does not establish a general right to live in an RV on a private parcel⁶. A New Hampshire municipality may permit a qualifying tiny home on an individual lot where single-family homes are allowed, but all local land-use, drinking-water and wastewater requirements still apply⁷. A privy is not an automatic off-grid workaround: its location and construction require approval from the municipal health official, who may also require DES approval²⁴.

1. Ask the parcel's town office for its zoning map, building-permit application, fee schedule, inspection sequence and certificate-of-occupancy requirements^1,4,8,11.

1. If dividing land, ask the municipal planning board about subdivision approval and DES about state requirements for subdivisions served by septic systems^20,21.

1. Apply through the town where local building-code enforcement exists; contact the State Fire Marshal for projects covered by the state building-permit system^1,12,13.

1. Obtain DES Approval for Construction for the septic system, plus any required prior municipal signoff; keep the system uncovered until final inspection and obtain Approval for Operation before use^5,21,23.

1. Before drilling a private well, ask the town and DES about well requirements; we could not confirm a universal ordinary-well construction permit¹⁰.

1. Complete required building inspections and obtain any required certificate of occupancy before moving in¹¹.

Start with septic feasibility because only about 5.9% of Grafton County soils lack severe limitations for a conventional drain field²². Check slope and clearing costs too: about 47.6% of the land has a slope of 15% or less, while roughly 93.5% is wooded²². Ask whether the municipality has a floodplain ordinance because towns may adopt one through National Flood Insurance Program enrollment²⁵. Grafton County's effective property-tax rate is about 1.9%, and the median annual property-tax bill is about $5,624²². Private-well research should include yield, setbacks and completion reporting because a universal ordinary-well construction permit was not confirmed¹⁰.