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New Hampshire · Oversize & Overweight

New Hampshire Oversize & Overweight Permits filed with NHDOT for you, 24/7

In New Hampshire, a load over 8 ft 6 in wide, 13 ft 6 in high or the legal weight needs a permit from the NHDOT permit office in the Bureau of Highway Maintenance. A single-trip permit runs 5 business days, and oversize moves stay off the road on weekends. Send us the load and route: our permit desk quotes the price and files every permit the trip needs.

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What will an oversize permit in New Hampshire cost?

Enter your pickup and delivery locations, choose your permit type, and compare estimated permit costs across route options.

  1. Oversize and overweight permits across the lower 48 and DC
  2. State-by-state fee breakdown for each route option
  3. Order your permit or talk to a specialist
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New Hampshire rules

New Hampshire legal limits and permit rules

The size and weight New Hampshire allows without a permit, when a load takes a civilian or State Police escort, and the days, hours and weather a permitted move can run in.

Legal limits without a permit

Width
8 ft 6 in
Height
13 ft 6 in
Single unit, bumpers included
45 ft
Semitrailer
53 ft
Gross, 5+ axle combination
80,000 lbs
Interstate axle, over 8 ft apart
20,000 lbs

Escorts

12 ft wide (under 14 ft), 90 ft long, over 14 ft high or 15 ft overhang
One non-police escort
Rear overhang 15 ft and 12 ft wide or more
A second non-police escort
100 ft long or more
One State Police escort
Over 14 ft wide
Two State Police escorts
Road closure needed
Three State Police escorts
Escort vehicle
Compact car or larger, amber light seen at 1,000 ft, two-way radio, OVERSIZE LOAD sign at least 5 ft x 12 in

When you can move

Days
Weekdays only; supermoves may run any day, weekends included
Hours
1/2 hour before sunrise to 1/2 hour after sunset
Holidays
10 holidays plus the day after Thanksgiving; a Saturday holiday also closes the Friday before, a Sunday holiday the Monday after
Weather
No moves in fog, haze, heavy rain, freezing rain, sleet, ice, snow or wind
Overweight-only loads
At normal speed, exempt from day and hour limits
On the road
Pull over when 7 or more vehicles queue behind; no convoys

Source: RSA 266:10, 266:11, 266:11-a, 266:12, 266:18, 266:18-a, 266:24-b; N.H. Admin. Rules Tra 304. Your permit's own conditions always apply.

Which permit you need

New Hampshire permits for oversize and overweight loads

  1. Up to 15 ft wide, 110 ft long, 13 ft 6 in high

    Single-trip permit

    Valid 5 business days. A round trip back by the reverse route is valid 10.

  2. Repeat moves, up to 10 ft 6 in wide

    Annual permit

    Single units to 45 ft, combinations to 75 ft, 13 ft 6 in high, at the New Hampshire registered weight. Covers a 100-mile radius, a set area or the whole state for one year. Not for supermoves.

  3. Past single-trip size or over 149,999 lbs

    Supermove

    An engineering inspection by a New Hampshire licensed professional engineer. NHDOT decides within 30 days of a complete application.

  4. Manufactured housing and modular buildings

    Housing and building moves

    Never over 16 ft wide, with a 6 in eave allowance. Mon–Fri up to 14 ft wide, Tue–Thu only from over 14 ft to 16 ft, and no moves when wind tops 25 mph.

Routes and road rules

Where New Hampshire routes add their own rules

Interstate weights, 53 ft trailers, town roads and the turnpikes each change how a New Hampshire move is planned.

  1. Interstate and off-interstate weights

    On the interstate, axles more than 8 ft apart carry 20,000 lbs and axles 8 ft apart or less 17,000 lbs above 73,280 lbs gross. Off it, a 3-axle single unit stops at 55,000 lbs and a 4-axle at 60,000 lbs.

    I-89, I-93, I-95:Unposted stretches use the off-interstate limits.

  2. Semitrailers over 48 ft

    Up to 53 ft is legal with a kingpin-to-rear-axle distance of 41 ft or less, on the interstate or designated highways.

    Access:Up to 1 mile off those highways.

  3. Town roads

    A state permit covers state-maintained roads only.

    Local:Town roads on the route need the town's permission.

  4. Interstate and toll highways

    Buildings on independent carriage assemblies over 12 ft wide are barred from these systems.

    Exception:When the turnpike or district engineer approves the move.

New Hampshire loads

New Hampshire permits for the loads New Hampshire hauls

Long timber and metal, regional freight, homes and tall loads each have rules written for them.

  1. Poles, logs, timbers, metal

    No length limit when it can't be split

    Exempt from length limits when the load is not divisible and the overhang doesn't interfere with steering.

  2. New England freight

    NETC regional permit

    A load moving on a New England Transportation Consortium permit needs no separate New Hampshire permit.

  3. Manufactured housing

    Up to 14 ft 6 in high

    Allowed in height for manufactured housing; over 13 ft 6 in it travels with a non-police escort.

  4. Tall and long loads

    Route survey

    Required over 13 ft 6 in high or 110 ft long.

How it works

Your New Hampshire permit in three steps

  1. Send the load and route

    Truck, trailer, dimensions, weight, origin and destination. Your fleet details are saved for next time.

  2. We check and file

    Our permit desk checks the New Hampshire rules for your load and files with NHDOT.

  3. Get your permit

    You get the permit PDF, a written route and an interactive route map to share with the driver.

From our permit desk

What we check before filing in New Hampshire

  1. Weekends and holiday edges

    Oversize permits don't run on weekends, and a Saturday or Sunday holiday also closes the Friday before or the Monday after. We set your dates around both before filing.

  2. Supermoves start early

    NHDOT can take up to 30 days on a complete supermove application, after a licensed engineer's inspection. We send the file complete the first time.

  3. Bridges and town roads

    On two-way bridges 24 ft wide or less, police stop traffic for the move, and town roads need local permission. We flag both on your route.

FAQ

New Hampshire oversize permit questions

Which New Hampshire office writes oversize and overweight permits?

The NHDOT permit office, part of the Bureau of Highway Maintenance. Its permits cover state-maintained roads; towns permit their own roads.

How much does a New Hampshire oversize permit cost?

It depends on the permit type, size, weight and route; supermoves add an engineering inspection. Put your route into our permit cost calculator for an estimate, or send us the load and our permit desk quotes the exact price before filing.

How many business days is a New Hampshire single-trip permit good for?

5 business days. A round trip returning by the reverse route gets 10.

At what size or weight does a New Hampshire move become a supermove?

Over 15 ft wide, 110 ft long or 13 ft 6 in high, or over 149,999 lbs. It takes an engineering inspection by a New Hampshire licensed professional engineer, and it may move at any time, weekends included.

Do New Hampshire oversize permits allow Saturday or Sunday travel?

No, except for supermoves. Overweight-only loads at normal speed are exempt from the day and hour limits.

Does a New England regional permit replace the New Hampshire one?

Yes. A load moving under a New England Transportation Consortium regional permit needs no New Hampshire permit.

How does Route One GO get my New Hampshire permit?

Send us the truck, trailer, load dimensions, axle weights and route. Our permit desk checks the New Hampshire rules, files with NHDOT and sends you the permit. Requests are taken 24/7.

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