Official departmental resources and application guides for county permit offices across New Hampshire.
Before using this directory to locate county building department contacts, verify whether your property lies within incorporated city limits. Incorporated municipalities often operate their own building departments, while unincorporated areas are commonly served by the county building department.
Every county and municipality in New Hampshire applies building codes through local review and inspection processes. Use official state or local source links before submitting documents or paying fees.
Search official New Hampshire building authority →Before hiring a contractor or applying as an owner-builder, verify credentials through the appropriate official licensing or registration system.
Verify contractor license in New Hampshire →Use this playbook to move from a broad state-level search to the correct local permit office. The state may publish codes, licensing rules, or specialty board guidance, but most building permits are still processed locally.
Use the property address, parcel, or GIS record to confirm county and city limits before choosing an application office.
In many areas, counties serve unincorporated property while cities serve addresses inside municipal limits.
Contractor licensing, trade board rules, manufactured housing, fire, elevator, energy, or accessibility reviews may involve state agencies.
Fees may include plan review, permit issuance, trade permits, reinspections, impact fees, and technology surcharges.
Online portals vary. Some offices offer public status lookup, while others require phone, email, or account login.
Save approvals, inspection cards, final documents, and certificates for resale, insurance, and future improvements.
This matrix helps homeowners, contractors, landlords, and property managers decide which official department or permit category to verify first. Local rules can be stricter than general state guidance, especially inside city limits.
| Project type | Likely permit path | Documents to prepare | Inspection notes |
|---|---|---|---|
| New structure, addition, major remodel | Building permit or construction permit | Site plan, drawings, valuation, contractor or owner-builder details | Foundation, framing, trade rough-ins, final inspection |
| Panel, wiring, EV charger, generator | Electrical permit | Electrical scope, load details, licensed contractor information where required | Rough electrical and final electrical inspections |
| Water heater, sewer, piping, fixtures | Plumbing permit | Fixture count, line diagram, contractor license details where required | Rough plumbing, pressure test, final inspection |
| HVAC, ductwork, gas appliance, refrigeration | Mechanical permit | Equipment specs, energy forms, installation location, contractor information | Rough mechanical, startup, final inspection |
| Fence, deck, shed, driveway, accessory building | Building, zoning, or land-use review | Plot plan, setbacks, easements, HOA or floodplain notes where applicable | Site inspection or final inspection may be required |
| Demolition or structural removal | Demolition permit | Utility disconnects, asbestos or environmental notes, debris plan | Pre-demolition approval and final site clearance |
This state hub is designed to prevent the most common permit research mistake: assuming a statewide rule automatically tells you where to apply. State agencies may publish building codes, contractor licensing rules, energy standards, manufactured housing rules, fire-marshal requirements, or specialty permits, but building permits are usually processed by a local office.
| Research layer | What it usually controls | What to verify locally |
|---|---|---|
| State code or licensing office | Code adoption, contractor licensing, trade boards, energy rules, fire or specialty program oversight | Whether the local county or city has stricter forms, fees, portal steps, or inspection windows |
| County building department | Unincorporated-area permits, plan review, inspections, zoning coordination, fee schedules | Whether the parcel is outside city limits and whether special districts apply |
| City permit office | Permits inside municipal boundaries, local zoning, business occupancy, local inspections | Whether the city has separate trade permits, plan review requirements, or contractor registration |
| Special review agencies | Floodplain, health, septic, fire, public works, DOT, historic, environmental, or utility approvals | Whether your project triggers extra approvals before the building permit can be issued |
There are 1 county hub pages linked from this state section. Use the county page as your first local research layer, then confirm city-vs-county jurisdiction before using any portal or fee table.
Use a tax assessor, GIS, zoning map, or local address lookup to identify the governing city or unincorporated county area.
The county hub summarizes official source routes, common permit categories, fee/status/inspection shortcuts, and practical local checklist items.
If the property is inside city limits, the city may handle permit issuance even when the county name appears in the mailing address.
Electrical, plumbing, mechanical, fire, and solar permits may follow additional licensing or state board rules.
Do not estimate from another county. Local valuation tables and surcharge rules can be very different.
Save application receipts, issued permits, inspection approvals, correction letters, and final closeout documents.
A strong permit workflow does not end when the application is submitted. Users should keep clean records because these documents may be needed for final inspections, insurance claims, refinancing, property sale disclosures, future additions, or code enforcement questions.
Before selecting a county page, gather the project address, parcel number, city-limit status, property use, proposed work description, contractor information, and any existing permit or violation numbers. This makes county and city research faster and reduces the chance of choosing the wrong official source.
Postal city names do not always identify the permit office. Use parcel or jurisdiction lookup when possible.
Electrical, plumbing, mechanical, fire, solar, and gas work may involve separate permits, inspectors, and license rules.
Open or expired permits, violations, and previous unpermitted work can affect the new application.
Start with the state hub, then select the local county or city jurisdiction. Permit authority is usually local, while state agencies may provide code, licensing, or specialty permit guidance.
No. Counties and cities may use different forms, fee schedules, portals, inspections, and review timelines. Always confirm requirements with the official local office.
Use the county directory on this page, then confirm whether your property is inside city limits or an unincorporated county area before applying.
Contractor licensing depends on trade type, project scope, and state or local rules. Use official state licensing resources before hiring or applying.
Usually no. Building, zoning, trade, and inspection forms are commonly issued by the local city or county department.
Yes. Fees may depend on valuation, square footage, plan review, inspections, impact fees, and local ordinances.
Use the official status portal or department contact linked from the local county or city page. Not every jurisdiction offers a public online lookup.
The application may be rejected, delayed, or require resubmission. Always verify city-versus-county jurisdiction before paying fees.
Most building and trade permits require inspections before work is covered or finalized. The exact sequence is set by the official department.
No. AllPermitSearch is independent and informational only. It links users to official sources for final requirements.