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

At a glance

Building permit

Covered construction requires a building permit; ask the town which process applies¹⁶

Zoning

No countywide zoning; municipal rules vary by town³⁴

Septic permit

New Hampshire DES approval is required before construction⁷⁵

RV living

Long-term private-parcel occupancy is unconfirmed; ask the town⁸

Tiny home

Towns may allow qualifying tiny homes; local land-use rules still apply⁹

Owner-builder

Limited exception for an owner-occupied family residence; not a blanket waiver¹⁰

Manufactured home

Towns cannot exclude manufactured housing completely, but local siting controls apply¹¹

Private well

No universal ordinary-well construction permit confirmed; completion reporting applies¹²

Who to call

Contact details are copied from each office’s official page and were checked against it on October 12, 2026.

Do you need a building permit 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 codes²¹³. The code in effect when the building-permit application is received remains applicable for the duration of the permitted work¹³. Where local enforcement exists, the municipal building official performs inspections needed for code compliance; the inspection schedule is not uniform countywide¹⁴. A municipality may require a certificate of occupancy before use of a new, remodeled or changed-use building¹⁵¹⁶. 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 requirements¹⁰.

Who handles Grafton County building permits, and what are the fees?

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 dwellings⁶¹⁷. The State Fire Marshal accepts state building-permit applications, while septic design and construction approvals remain with New Hampshire DES¹⁸⁷. Local building-permit, inspection and occupancy fees depend on the municipality's fee schedule¹⁹. 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 applying²⁰. The state program's new-commercial-building fee is $0.30 per gross square foot, with separate electrical, plumbing, mechanical and fire-protection permits required¹⁷. 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 units²¹.

Does Grafton County have zoning?

Grafton County has no countywide zoning; municipal ordinances determine local land uses and dimensional requirements³⁴. 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 issue²²²³. The state planning office's village-district directory is incomplete, so obtain the parcel's current municipal ordinance and map²⁴. 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 apply²⁵²⁶. 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 apply²⁷²⁸. 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 rules²⁹³⁰.

How do septic permits work in Grafton County?

New Hampshire DES is the septic approval authority for Grafton County, although local water-supply and sewage-disposal requirements may also apply³¹³². 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 oversight³³. 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 price³⁴. The Subsurface Systems Bureau reviews designs and issues construction and operation approvals³⁵.

Can you live in an RV or tiny home in Grafton County?

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 requirements⁴⁷. 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 parcel⁸. 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 apply⁹. 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 approval³⁶.

What are the steps to building a home in Grafton County?

1. Ask the parcel's town office for its zoning map, building-permit application, fee schedule, inspection sequence and certificate-of-occupancy requirements^46191415.

1. If dividing land, ask the municipal planning board about subdivision approval and DES about state requirements for subdivisions served by septic systems²⁹³⁰.

1. Apply through the town where local building-code enforcement exists; contact the State Fire Marshal for projects covered by the state building-permit system⁶¹⁷¹⁸.

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 use⁵³³³⁵.

1. Before drilling a private well, ask the town and DES about well requirements; we could not confirm a universal ordinary-well construction permit¹².

1. Complete required building inspections and obtain any required certificate of occupancy before moving in¹⁴¹⁵.

What should you check before buying land in Grafton County?

Start with septic feasibility because only about 5.9% of Grafton County soils lack severe limitations for a conventional drain field³⁴. Check slope and clearing costs too: about 47.6% of the land has a slope of 15% or less, while roughly 93.5% is wooded³⁷³⁸. Ask whether the municipality has a floodplain ordinance because towns may adopt one through National Flood Insurance Program enrollment³⁹. Grafton County's effective property-tax rate is about 1.9%, and the median annual property-tax bill is about $5,624⁴⁰⁴¹. Private-well research should include yield, setbacks and completion reporting because a universal ordinary-well construction permit was not confirmed¹².

Watch-outs

• In unincorporated towns or unorganized places, state law requires a county-planning-board building permit for buildings erected on leased land; confirm the applicable county process before building⁴².
• Do not cover or use a newly built septic system before final inspection and approval⁴³.
• Ashland's published residential fee schedule doubles application and building-permit fees when construction starts without a required building permit²⁰.
• An agricultural building or use is not categorically exempt from local setbacks, driveway rules and other dimensional standards⁴⁴.

Sources

1. Section 155-A:4 Permit Required, quoted and re-checked
2. Chapter 155-A New Hampshire Building Code, quoted and re-checked
3. NH Municipal Association: The State of Local Land Use Regulations in New Hampshire (2026 county census)
4. RSA 674:16 Grant of Power, quoted and re-checked
5. RSA 485-A:32, Prior Approval; Permits, quoted and re-checked
6. New Hampshire Building Code, RSA chapter 155-A, quoted and re-checked
7. RSA 485-A:32, Prior Approval; Permits, quoted and re-checked
8. Chapter 216-I Recreational Campgrounds and Camping Parks (New Hampshire statewide rule), quoted and re-checked
9. gc.nh.gov, quoted and re-checked
10. RSA 155-A:3 Enforcement mechanism, quoted and re-checked
11. RSA 674:32, Manufactured Housing, quoted and re-checked
12. RSA 482-B:10 Record of Wells; Monitoring Wells (New Hampshire statewide rule), quoted and re-checked
13. Chapter 155-A New Hampshire Building Code, quoted and re-checked
14. Chapter 155-A New Hampshire Building Code, quoted and re-checked
15. Chapter 155-A New Hampshire Building Code, quoted and re-checked
16. RSA 155-A:3, Enforcement Mechanism, quoted and re-checked
17. Saf-C 8100 State Building Permit System, quoted and re-checked
18. New Hampshire Office of the State Fire Marshal, State Building Permit Program (nh.gov)
19. RSA 155-A:2 State Building Code, quoted and re-checked
20. Ashland, NH – Residential Building Permit Application, quoted and re-checked
21. Section 155-A:4 Permit Required, quoted and re-checked
22. Lebanon: Zoning Ordinance and Map (Grafton County), quoted and re-checked
23. Lebanon: Residential Structures (Grafton County), quoted and re-checked
24. chesterfield.nh.gov, quoted and re-checked
25. Ashland Zoning Ordinance, Lots Without Town Sewer, quoted and re-checked
26. Ashland Zoning Ordinance – Amended March 11, 2025, quoted and re-checked
27. RSA 674:72 Accessory Dwelling Units, quoted and re-checked
28. Ashland Zoning Ordinance – Amended March 11, 2025, quoted and re-checked
29. RSA 674:35 Power to Regulate Subdivisions, quoted and re-checked
30. Chapter Env-Wq 1000 Subdivisions; Individual Sewage Disposal Systems, quoted and re-checked
31. RSA 485-A:32 Prior Approval; Permits, quoted and re-checked
32. RSA 485-A:32 Prior Approval; Permits, quoted and re-checked
33. Env-Wq 1004.06 ISDS Inspection Required, quoted and re-checked
34. Share of soils USDA rates "not limited" for a conventional septic drain field (SSURGO). A strict rating: the median county is about 6% and a tenth of counties are 0%, so a low figure means most lots need a site evaluation or an engineered system, not that septic is impossible. Cite it only with that caveat: Bolthole Index county data
35. New Hampshire Department of Environmental Services, Subsurface Systems Bureau (des.nh.gov)
36. gc.nh.gov, quoted and re-checked
37. Share of land at 15% slope or less: Bolthole Index county data
38. Wooded share of land: Bolthole Index county data
39. RSA 674:56 Flood Hazards, quoted and re-checked
40. Effective property tax rate: Bolthole Index county data
41. Median property tax bill: Bolthole Index county data
42. RSA 674:41 Erection of Buildings on Streets; Appeals, quoted and re-checked
43. Chapter Env-Wq 1000 Subdivisions; Individual Sewage Disposal Systems, quoted and re-checked
44. RSA 674:32-c Other General Provisions, quoted and re-checked

Written October 12, 2026 from the rules quoted below, each taken from an official source and re-checked by an independent reviewer. This is research, not legal advice: rules change, so confirm with the office before you buy or build.