New Hampshire Statewide Rule

New Hampshire Requires a 48-Inch Barrier Around Every Pool

Some RestrictionsApplies statewide across New Hampshire (2026)

Key Facts

Governing statute: RSA 155-A:1, IV
Adopted code: ISPSC 2021, Section 305
Minimum barrier height: 48 inches
Gates: Self-closing, self-latching, open outward
Chain-link mesh opening: Max 1 3/4 inches

Last verified: July 31, 2026

Summary

New Hampshire adopts the International Swimming Pool and Spa Code 2021 as part of its statewide building code under RSA 155-A:1, IV, so every residential pool must be enclosed by a barrier at least 48 inches high with self-closing, self-latching gates.

IV. "New Hampshire building code" or "state building code" means the adoption by reference of the International Building Code 2021, the International Existing Building Code 2021, the International Plumbing Code 2021, the International Mechanical Code 2021, the International Energy Conservation Code 2018, the International Swimming Pool and Spa Code 2021 and the International Residential Code 2021, as published by the International Code Council Inc.

View official code

Full Breakdown

RSA 155-A:1, IV makes the International Swimming Pool and Spa Code (ISPSC) 2021 part of the New Hampshire State Building Code, giving its barrier rules statewide force. Under ISPSC Section 305, a pool holding water more than 24 inches deep must be surrounded by a barrier at least 48 inches tall, measured on the side facing away from the pool. Pedestrian gates must open outward, be self-closing, and have a self-latching device. Openings cannot pass a 4-inch sphere, and chain-link mesh cannot exceed 1 3/4 inches. Local building officials enforce the code through the permit and inspection process.

Violations & Penalties

A pool that fails the barrier standard will not pass building inspection. Local code officials can withhold the permit, issue a correction order, or require a stop-work order until the enclosure complies.

Frequently Asked Questions

How tall must a pool fence be in New Hampshire?

At least 48 inches, measured on the side facing away from the pool, under ISPSC Section 305 adopted into the State Building Code by RSA 155-A:1, IV.

Does New Hampshire require a fence around above-ground pools?

Yes. The adopted ISPSC covers any pool over 24 inches deep, so above-ground pools need a 48-inch barrier unless the pool wall meets that height and the ladder is removable or lockable.

Who enforces pool barrier rules in New Hampshire?

Local building and code-enforcement officials enforce the State Building Code through permits and inspections; the State Building Code Review Board maintains the adopted model codes.

Sources

NH RSA 155-A:1 — State Building Code definitions

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