Do You Need a Fence Permit in NH? A Town-by-Town Guide

New Hampshire does not have a statewide fence permit requirement. Permitting is entirely at the local level, which means the rules in Nashua are different from the rules in Bedford, which are different from the rules in a small town with no zoning enforcement at all. Before you start any fence project, you need to know what your specific town requires.

The General Rule in Most NH Towns

In most Southern NH municipalities, residential fences 6 feet or shorter on non-front-yard property lines do not require a building permit. However, almost every town has setback requirements, height restrictions by yard location (front vs. back), and sometimes HOA overlay restrictions that operate independently of the town permit system.

Where Permits Are Commonly Required

• Pool barrier fences: virtually always require a permit and inspection regardless of height
• Fences over 6 feet: most towns require a zoning or building permit
• Front yard fences: many towns have strict height limits (4 feet is common) and sometimes prohibit solid privacy fences in front yards entirely
• Commercial properties: typically require permits for any fence installation
• Fences within road right-of-way setbacks: requires special approval

Common Height Restrictions

Most NH municipalities follow a similar pattern for how tall a fence can be, though the exact numbers are set town by town:

• Rear and side yards: 6 feet maximum in most towns (Nashua allows up to 7)
• Front yards: 4 feet maximum, sometimes 3 feet, and solid privacy fences are often restricted or prohibited
• Corner lots: sight-line setbacks can reduce the allowed height near intersections and driveways
• Pool enclosures: minimum 48 inches required by NH code regardless of town

Some towns allow a taller fence with a variance or conditional use permit. If you need more than 6 feet for privacy or security, ask about the variance process when you apply.

Setback Requirements

Most towns require fences to be set back from the property line by 6 inches to 2 feet. This keeps the fence off the boundary, prevents encroachment disputes with neighbors, and leaves maintenance access on both sides. If you are not sure where your line falls, get a property survey before you install. A survey is far cheaper than moving a finished fence.

Putting a fence around a pool? The permit is only step one. Our NH pool fence code guide covers the barrier height, gate, and gap specs your inspector will measure.

Town-by-Town Snapshot

This is a general overview — always verify with your town's building or zoning department before starting:

• Nashua: Fence and wall permits are required and go through the Building Safety Department. Residential fences are capped at 7 feet under the city's land use code, and fences can't create sight-line problems at corners or driveways.
• Manchester: Fences at or under 6 feet generally don't need a permit, but setback rules still apply. Check with Manchester Planning for front yard restrictions.
• Bedford: Has specific setback requirements from property lines. Pool barriers strictly enforced. Recommend calling Building & Zoning before any install.
• Hudson: No permit required for standard residential fences. Pool barriers require permit.
• Merrimack: Building permit required for most fences. Height and material rules vary by zone, so confirm before ordering.
• Londonderry: Zoning permit required, with a 6-foot cap in residential zones. HOA restrictions are common in many developments, so check both.
• Derry: No permit required for standard residential privacy fences. Pool barriers require permit.
• Salem: Permit required for pool barriers. General fences: verify with Building Department.
• Windham: Many neighborhoods have HOA restrictions that are stricter than town code. Check both.
• Exeter/Dover/Portsmouth: More active building departments — call before installing anything.

What Happens If You Skip the Permit

For general residential fences in most of these towns, the practical risk of skipping a permit (when one isn't required) is zero — because no permit is required. But if you install a pool barrier without a permit, or put up a 7-foot fence in a town where anything over 6 requires approval, you risk a stop-work order, a requirement to remove and reinstall the fence, and potential fines.

The more serious risk: if a child is injured at a non-compliant pool barrier that went in without a permit, the liability lands on you.

HOA Rules Are Separate from Town Permits

If you live in a planned development or any neighborhood with a homeowners association, the HOA's covenants, conditions, and restrictions (CC&Rs) control fence style, height, material, and color — independently of anything the town says. HOA rules are often stricter. Always check with your HOA board and get written approval before installing. We've seen homeowners get forced to remove brand-new fences because they got town approval but forgot about their HOA.

Before You Call a Contractor

1. Call your town's building or zoning department — ask specifically about fence height limits by yard location and whether a permit is required for your project
2. Pull your deed and survey — know where your property lines actually are before installing
3. Check your HOA documents if applicable
4. For pool barriers, always pull a permit and schedule inspection

Sources

• NH RSA 674, Local Land Use Planning and Regulatory Powers (the statute that lets towns set their own zoning and fence rules) (NH General Court)
• City of Nashua Fence-Wall Permit Application (PDF, nashuanh.gov)
• NH RSA 155-A, New Hampshire Building Code (adopts the pool barrier provisions of the International Swimming Pool and Spa Code 2021) (NH General Court)