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Getting Your Site Plan Approved in New Hampshire
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Site Plans approved in every county in every state
| County | Permit Authority | Site Plan Notes |
|---|---|---|
| Hillsborough County | Manchester Planning & Community Development; Nashua Building Division; local building departments vary by municipality | Manchester enforces site and subdivision plan review regulations through its Planning and Community Development Department. In Nashua, starting construction before a permit is issued triggers a surcharge equal to 100% of the normal permit fee — a pre-drawn site plan helps ensure your application is complete before work begins. Hudson also requires a plot plan for most building permits. |
| Rockingham County | Portsmouth Planning Board; local building departments vary by municipality | Portsmouth's Planning Board requires formal site plan review for all non-residential development and multi-unit residential development, covering drainage, traffic, and lighting impacts. Hampton requires a permit — with an accompanying site plan showing distance to property lines — for any fence erection, alteration, or demolition, as well as for driveway permits requiring sign-off from the Building Inspector and Director of Public Works. Rye similarly mandates site plans for fence and driveway permits. |
| Merrimack County | Concord Planning Board; local building departments vary by municipality | Concord's Planning Board requires site plan review approval for non-residential uses, multi-family units, changes of use, and additions that alter the outward appearance of non-residential structures. Demolition permits are required for structures over 500 sq ft that are more than 50 years old, with processing times up to 49 days. Concord also enforces a 70 psf ground snow load requirement — structural plans must reflect community-specific values, and a site plan showing building placement and setbacks is essential for any permit application. |
| Strafford County | Rochester Building & Zoning Department; local building departments vary by municipality | Rochester requires an accurately drawn-to-scale site plan showing street names, lot dimensions, setbacks, building locations, and septic system placement before any foundation or building permit is issued. Note: Rochester also requires a foundation certification plan stamped by a licensed NH land surveyor before a Certificate of Occupancy is issued — MySitePlan provides the site plan drawing, but not the surveyor stamp; customers needing a stamped survey should consult a licensed NH land surveyor. |
| Grafton County | Local building departments vary by municipality; NH Division of Fire Safety for municipalities without local code enforcement | Many Grafton County towns have part-time code officials, making a clear, pre-drawn site plan especially valuable for streamlining permit review. New construction, additions, accessory structures, and demolition permits all commonly require a site plan showing lot lines, setbacks, structure locations, and driveway placement. Properties near lakes or rivers may also require NHDES review under the Shoreland Water Quality Protection Act (RSA 483-B). |
| Cheshire County | Keene Planning & Development Services; local building departments vary by municipality | Keene is the county seat and largest city in Cheshire County, with its Planning & Development Services department overseeing building permits and site plan submissions. Across the county, site plans are required for new construction, additions, accessory structures (sheds and garages above threshold square footage), and swimming pool permits. NH's municipal permitting framework under RSA 155-A means requirements vary by town — verify specifics with your local building department. |
| Belknap County | Local building departments vary by municipality; NH Division of Fire Safety for municipalities without local code enforcement | Belknap County encompasses the Lake Winnipesaukee shoreline, meaning many properties fall under NHDES shoreland permitting requirements and the Shoreland Water Quality Protection Act (RSA 483-B) — a site plan showing lot lines, structure placement, and setbacks from the water is critical for these applications. New construction, additions, deck permits, and accessory structure permits all typically require a site plan at the local building department level. |
| Carroll County | Local building departments vary by municipality; NH Division of Fire Safety for municipalities without local code enforcement | Carroll County includes a high concentration of lakefront and vacation properties subject to NHDES shoreland and wetland permitting under RSA 483-B, where a site plan showing structure locations relative to property lines and protected waterbodies is essential. Many towns in Carroll County have part-time building officials, so submitting a complete, clearly drawn site plan upfront can significantly speed permit approval for new construction, additions, and accessory structures. |
| Sullivan County | Local building departments vary by municipality; NH Division of Fire Safety for municipalities without local code enforcement | Sullivan County municipalities follow New Hampshire's municipal permitting framework under RSA 155-A, with each town responsible for building permit issuance and code enforcement. Site plans showing lot dimensions, setbacks, structure locations, driveways, septic systems, and wells are standard requirements for new construction, additions, and accessory structure permits. Towns with part-time code officials particularly benefit from applicants submitting a complete site plan with the initial permit package. |
| Coos County | Local building departments vary by municipality; NH Division of Fire Safety for municipalities without local code enforcement | Coos County is New Hampshire's largest and most rural county, with many small towns that rely on the NH Division of Fire Safety (Fire Marshal's Office) for plan review when no local code enforcement mechanism is in place. Site plans are required for new construction, additions, and accessory structures wherever local permitting applies. Properties near rivers, streams, or wetlands are subject to NHDES permitting under RSA 483-B, and a site plan showing lot lines and structure setbacks is a required component of those applications. |