New Hampshire oversize permit office
New Hampshire Department of Transportation, Oversize/Overweight Permit Office. Call (603) 271-2691, 8:00AM - 4:00PM (M-F) Eastern time.
From New Hampshire's own pages, checked 2026-10-24. Fees and rules change: the state's page is the last word.
- Apply online
- NHDOT PermitsSource
- How to get one
- Apply online at nhdotpermits.org any time, day or night. You can also mail a paper application with a check to the NHDOT permit office.
- Single trip fee
- Single trip permit: over length, width, or height or combination thereof $6.00. Overweight: vehicle & load over registered weight but not exceeding 50,000 lbs $5.50, up to $10.50 for 90,001 to 100,000 lbs, plus $2.00 for each additional 10,000 pounds.Source
- Legal without a permit
- Width 8' 6" · Height 13' 6" · Length 48' (Semi-Trailer) · Weight 80,000 lbs gross (combination with 5 axles, 51 ft between extreme axles, if registered for that amount)Source
- How fast
- Some permits are issued automatically by the online system: loads up to 149,999 lbs that are no more than 15 ft wide, 110 ft long and 13 ft 6 in high. Staff handle the others in the order received, Monday-Friday 8 AM-4 PM.Source
When you can move
- Daylight
- Oversize loads move in daylight only, from 30 minutes before sunrise to 30 minutes after sunset; overweight-only loads at normal speed have no time limits, and no permit move is allowed in bad weather.Source
- At night
- No night moves, except as set in a supermove permit or for buildings on their own carriage wider than 12 ft.
- Weekends
- No weekend travel for oversize loads, except as set in a supermove permit or for buildings on their own carriage wider than 12 ft.
- Holidays
- New Year's Day, Martin Luther King, Jr. Civil Rights Day, Washington's Birthday (Presidents Day), Memorial Day, Independence Day, Labor Day, Columbus Day, Veterans Day, Thanksgiving Day, Day after Thanksgiving, Christmas Day. No permit travel all day on the holiday; a Sunday holiday also closes the Monday after and a Saturday holiday closes the Friday before (2026: Independence Day restricted Friday, July 3; Juneteenth not restricted). Next datesSource