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

At a glance

Building permit

Building permit required before covered construction; each town or city issues it¹

Building code

The state code applies in every municipality⁵

Zoning

No county zoning; each town or city sets its own zoning²

Septic permits

NHDES septic permits in every municipality; local approval may also apply³⁴

RV living

Private-land residential occupancy is unconfirmed; ask the parcel's municipality⁶⁷

Tiny home

No county zoning restriction, but municipal land-use rules and state standards apply⁸⁹

Owner-builder

Limited trade exemptions exist, but permits and inspections can still apply¹⁰¹¹

Private well

Ordinary-well permitting is unconfirmed; contractors must file a completion record after finishing¹²

Who to call

Contact details are copied from each office’s official page and were checked against it on October 9, 2026.

Do you need a building permit in Rockingham County, New Hampshire?

Covered construction, renovation, alteration, repair, removal or demolition in Rockingham County requires a building permit before work begins¹. The state building and fire codes apply throughout Rockingham County, while a municipality with a local enforcement mechanism uses its locally adopted permit process⁵¹³. Exeter is one example, not a countywide process: Exeter requires permits for residential and commercial construction¹⁴. The state permit system handles certain work where local enforcement is absent, but excludes one- and two-family dwellings in those municipalities¹⁵. An owner doing the work is not broadly exempt from permits or inspections, although limited plumbing and fuel-gas licensing exemptions may apply¹⁰¹¹. Identify the town or city first, then ask its building office which building permit, trade permit and inspection requirements apply. Septic permits are a separate approval from NHDES, not from the town building office.

Who issues Rockingham County building permits, and how do you reach them?

Start with the building or code-enforcement office (the office that issues building permits) for the town or city containing the parcel, because the official materials do not establish one countywide application process¹⁶. Exeter's Building Department provides inspections, code enforcement, zoning administration and permit applications only for Exeter¹⁷. The Exeter office is at 10 Front Street, Exeter, NH 03833, and its phone number is 603-773-6112¹⁷. A building official must act on a completed ordinary application within 30 days; the deadline is 60 days for a nonresidential application or a residential application encompassing more than 10 dwelling units¹⁶. The official cannot issue a permit that conflicts with applicable zoning, building-code or planning-board rules¹⁸. Municipalities may set their own building-permit, inspection and occupancy-certificate fee schedules, so request the current local schedule¹⁹.

Does Rockingham County have zoning?

Rockingham County does not have zoning power or other authority to regulate land use within its municipalities, so zoning approval must be checked with the town or city containing the parcel, while septic permits stay with the state³². Rockingham County therefore imposes no county minimum dwelling size, setback or minimum lot size within its municipalities, but municipal zoning and subdivision rules and state requirements may still apply²⁰²¹²². Local rules vary: Exeter has its own zoning ordinance and map, with the planning board responsible for the ordinance²³. A municipality with zoning that permits single-family dwellings in the district must allow one attached or detached accessory dwelling unit as a matter of right, subject to permitted municipal and septic requirements²⁴. Fremont offers a sample of how strict a town can be: a recent variance application there noted that a two-lot subdivision needs 2 acres total, 1 acre of buildable land and 200 feet of frontage for each lot under Fremont's zoning ordinance, and that was a single town's rule, not a countywide one²⁵. Municipal planning boards may adopt subdivision regulations and impose infrastructure conditions on plat approval²⁶. Request the parcel's current zoning map, allowed-use table, dimensional standards and subdivision regulations before relying on a listing description.

How do septic permits work in Rockingham County?

The New Hampshire Department of Environmental Services administers septic approval in Rockingham County, while local approval may also be required²⁷. A permitted New Hampshire septic-system designer must prepare and submit the proposed plans²⁸. Obtain NHDES plan approval before constructing a building that will discharge sewage or constructing the disposal system; qualifying in-kind repairs or replacements may use a permit-by-rule route⁴. The completed system cannot be covered or operated until final inspection and approval²⁹. Only 0.9% of county soils are rated without severe limitations for a conventional drain field, so make the site evaluation and septic design an early purchase contingency³⁰. NHDES can be reached at 29 Hazen Drive, Concord, NH 03302-0095, or (603) 271-3503²⁸.

Can you live in an RV or tiny home on land in Rockingham County?

Rockingham County imposes no county zoning restriction on tiny-home occupancy within its municipalities, but municipal land-use rules, building permits, and state water and wastewater requirements still apply⁸. New Hampshire allows a municipality to permit a tiny house on an individual lot where single-family homes are allowed or as an accessory dwelling unit; a qualifying tiny house is 600 square feet or less excluding lofts and must meet the applicable state-code standards⁹. Residential RV occupancy on private land remains unconfirmed, so ask the parcel's municipal zoning and building offices before buying or moving an RV onsite⁶⁷. The reviewed campground rule addresses temporary recreational occupancy in campgrounds or camping parks, not year-round residence on a private parcel⁶. For off-grid sanitation, state approval is not required for a composting or incinerator toilet only when the structure has neither internal plumbing nor supplied water service; local law still matters³¹.

How do you build a home in Rockingham County?

1. Identify the town or city containing the parcel, then request its zoning map, dimensional rules, fee schedule and permit checklist²¹⁹.

1. Confirm the local permit path and obtain a permit before covered work begins¹.

1. Hire a permitted New Hampshire septic-system designer and obtain NHDES approval before starting a building or system that will discharge sewage²⁸³².

1. Confirm the required inspection stages; inspections under a state-issued permit must be requested by the permit holder before covered work is concealed³³.

1. Obtain final septic inspection and operational approval before covering or using the system²⁹.

1. Ask whether the municipality requires a certificate of occupancy before use; municipalities may adopt that requirement and enforce it after satisfactory inspections, but the rule is not uniform countywide³⁴. State-owned buildings use a separate state-fire-marshal process³⁵. An owner-builder must also submit the state energy-code as-built certification before occupancy, to the office that issues certificates of occupancy where the town has one³⁶.

What should you check before buying land in Rockingham County?

Start with buildability: confirm the municipal zoning district, allowed use, setbacks, access and permit process²¹⁶. If land will be divided, do not begin road construction, clearing, filling or other site alteration when subdivision-plan approval is required; preliminary testing needed for review is allowed³⁷. Local subdivision regulations and state review may both matter²⁶. Septic feasibility deserves special attention because only 0.9% of county soils are rated without severe limitations for a conventional drain field³⁰. A public-sewer connection is required for covered buildings when sewer is within 100 feet, subject to municipal changes and approved waivers³⁸. For a private well, the contractor must file a completion record within 90 days, but a universal permit for every ordinary well was not confirmed¹². The effective property-tax rate is about 1.6%, and the median annual bill is about $7,512³⁹⁴⁰.

Watch-outs

• Exeter's permit and zoning information applies only to Exeter; obtain the current rules from the municipality containing the parcel¹⁷²³.
• Rockingham County sets no county minimum dwelling size, setback or minimum lot size within its municipalities, but the parcel's municipality may impose all three²⁰²¹²².
• Most Rockingham County soils are rated severely limited for a conventional drain field, so do not assume raw land will support a standard septic layout³⁰.

Sources

1. Chapter 155-A New Hampshire Building Code, quoted and re-checked
2. 2000 Signed and Approved Meeting Minutes — Rockingham County Housing and Community Development Plan, quoted and re-checked
3. Section 485-A:32 Prior Approval; Permits, quoted and re-checked
4. Section 485-A:32 Prior Approval; Permits, quoted and re-checked
5. RSA Chapter 155-A New Hampshire Building Code, quoted and re-checked
6. Chapter 216-I Recreational Campgrounds and Camping Parks (New Hampshire statewide rule), quoted and re-checked
7. Town of Exeter Zoning Ordinance and Map (2026 county census)
8. Rockingham County Housing and Community Development Plan, January 1998, quoted and re-checked
9. RSA 674:82 Definitions — Innovative Housing Structures, quoted and re-checked
10. RSA 153:36 — Exceptions (New Hampshire statewide rule), quoted and re-checked
11. RSA 155-A:4 — Permit Required (New Hampshire statewide rule), quoted and re-checked
12. RSA 482-B:10 Record of Wells; Monitoring Wells (New Hampshire statewide rule), quoted and re-checked
13. Section 155-A:4 Permit Required, quoted and re-checked
14. Town of Exeter Building Department (2026 county census)
15. Chapter 155-A New Hampshire Building Code (New Hampshire statewide rule), quoted and re-checked
16. Section 155-A:4 Permit Required, quoted and re-checked
17. Town of Exeter Building Department (Exeter parcels only) (exeternh.gov)
18. RSA 155-A:4 Permit Required, quoted and re-checked
19. Chapter 155-A New Hampshire Building Code, quoted and re-checked
20. Rockingham County Housing and Community Development Plan, January 1998, quoted and re-checked
21. Rockingham County Housing and Community Development Plan, January 1998, quoted and re-checked
22. Rockingham County Housing and Community Development Plan, January 1998, quoted and re-checked
23. Chapter 19: Zoning Ordinance and Map — Town of Exeter, quoted and re-checked
24. RSA 674:72 Accessory Dwelling Units, quoted and re-checked
25. Application and Public Hearing Information, quoted and re-checked
26. RSA Chapter 674 Local Land Use Planning and Regulatory Powers, quoted and re-checked
27. RSA 485-A:32 Prior Approval; Permits, quoted and re-checked
28. New Hampshire Department of Environmental Services (des.nh.gov)
29. Chapter 485-A Water Pollution and Waste Disposal, quoted and re-checked
30. 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
31. Env-Wq 1000 Subdivisions and Individual Sewage Disposal Systems (New Hampshire statewide rule), quoted and re-checked
32. RSA 485-A:32 Prior Approval; Permits, quoted and re-checked
33. Chapter 155-A New Hampshire Building Code, quoted and re-checked
34. Chapter 155-A New Hampshire Building Code, quoted and re-checked
35. RSA 155-A:3 Enforcement mechanism, quoted and re-checked
36. Puc 1805.01 As-Built Construction Certification Required, quoted and re-checked
37. gc.nh.gov, quoted and re-checked
38. RSA 147:8 Toilets; Drains (New Hampshire statewide rule), quoted and re-checked
39. Effective property tax rate: Bolthole Index county data
40. Median property tax bill: Bolthole Index county data

Written October 9, 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.