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New Hampshire OS/OW Permit Requirements

United States · NHDOT — Bureau of Traffic, Oversize/Overweight Permits

Everything heavy-haul carriers need to know before moving an oversize or overweight load through New Hampshire: survey triggers, fees, lead times and the official permit portal.

Lead time
5 business days
Base fee
$25 single-trip OS/OW permit
Permit validity
Up to 5 days

Route survey triggers

  • Height
    Height exceeds 13'6" — oversize permit required
  • Width
    Width exceeds 8'6" — oversize permit required
  • Length
    Length exceeds 65' — oversize permit required
  • Weight
    Gross weight exceeds 80,000 lbs — overweight permit required
  • Width
    Width exceeds 14' — route survey required
  • Height
    Height exceeds 14' — route survey required

Fee notes

Single-trip $25 base. Annual $200. Bridge restrictions trigger NHDOT engineering review at $150–$1,000 per analysis.

Official resources

Reference information last verified May 2026. Always confirm current requirements with NHDOT — Bureau of Traffic, Oversize/Overweight Permits.

Surveying a route through New Hampshire?

RoadScope generates New Hampshire-compliant survey reports automatically — the right sections, certifications and documentation for NHDOT — Bureau of Traffic, Oversize/Overweight Permits.

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