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New Hampshire RV length limits

New Hampshire's limits for motorhomes, trailers, triple towing and height, quoted from its own law. Enter your rig to check it.

The law in New Hampshire

Motorhome: 45 ft
"The driving on ways of this state of any vehicle or combination of vehicles whose length including load exceeds the limitations of this section is hereby prohibited: I. For a single unit vehicle or a bus, 45 feet including front and rear bumpers."
Triple towing: With conditions
"III. For a semi-trailer or full trailer being driven as part of a combination vehicle with 2 trailing units, 28 feet."
Height: 13 ft 6 in
"I. No vehicle, except a vehicle transporting manufactured housing or modular buildings, whose total height including load is greater than 13 feet, 6 inches, shall be driven on the ways of this state."
Width: 102 in (8 ft 6 in)
"The driving on ways of this state of any vehicle whose width including load exceeds the limitations of this section is hereby prohibited: I. A vehicle in excess of 102 inches in width."

RSA 266:10 to 266:14, Height, Length and Width (RSA chapter 266), checked November 2026.

RV Length Limits by StateNew Hampshire

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Truck and trailer or fifth wheel · New Hampshire

Check before you go

Check before you go. We found no overall length rule for your truck and trailer in New Hampshire's law.

Overall length
Not stated
No rule for this found in the state's law. Ask the state DOT before you drive.

Width: 102 in (8 ft 6 in)

"The driving on ways of this state of any vehicle whose width including load exceeds the limitations of this section is hereby prohibited: I. A vehicle in excess of 102 inches in width."

"A motor home, trailer coach, or recreation vehicle may be driven on the ways of this state when the overall width is greater than 102 inches, provided the excess over 102 inches is solely due to a non-load-carrying appurtenance that extends no more than 6 inches beyond the body of the vehicle."

"but does include an awning and its support hardware and other items that are intended to be an integral part of the vehicle and were installed by the motor vehicle manufacturer or dealer."

"Overall width shall be exclusive of rubrails, so-called, as currently used in the transportation of raw forest products, safety and energy conservation devices such as rear view mirrors, turn signal lamps, marker lamps, steps and handholds for entry and egress"

Source: RSA 266:10 to 266:14, Height, Length and Width (RSA chapter 266), checked November 2026.

See your rig against every state's limits

A guide to each state's published law, not legal advice. Lengths are measured as each state's law says (bumpers and hitches count in most); posted signs, local roads and permits can differ. The linked law is the authority.

Each state's own law, quoted
Motorhome, trailer or triple tow
Every state on your trip at once

Where to stay in New Hampshire

37 RV parks listed in New Hampshire.

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Common questions

RV length and towing questions

45 ft. New Hampshire's law says: "The driving on ways of this state of any vehicle or combination of vehicles whose length including load exceeds the limitations of this section is hereby prohibited: I. For a single unit vehicle or a bus, 45 feet including front and rear bumpers."

With conditions. New Hampshire's law says: "III. For a semi-trailer or full trailer being driven as part of a combination vehicle with 2 trailing units, 28 feet."

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