How close to a lake can I build in New Hampshire?

RSA 483-B requires at least 50 feet from the reference line of public waters. Municipal zoning may impose stricter setbacks but cannot reduce this state minimum.

What waters are protected by the Shoreland Act?

Public lakes 10 acres or larger, fourth-order or higher streams, designated rivers, and coastal waters. The protected zone extends 250 feet inland from the reference line.

Can a town allow a closer setback than 50 feet?

No. The shoreland setback is a state minimum that municipalities cannot reduce. DES enforces the rule uniformly across all New Hampshire jurisdictions.

New Hampshire Setback Rules (2026)

Key Facts

Statute: RSA 483-B
Primary setback: 50 feet minimum
Protected zone: 250 feet from waters
Administering agency: NH DES
Max daily penalty: $2,000

Source: New Hampshire General Court

Full Breakdown

The Shoreland Water Quality Protection Act (RSA 483-B) requires a minimum 50-foot primary building setback from the reference line of all public waters, including lakes over 10 acres, fourth-order streams, and designated rivers. Within the 250-foot protected shoreland, additional restrictions apply to vegetation, impervious surfaces, and septic systems. The Department of Environmental Services administers permits. Municipal zoning cannot reduce these state minimums but may impose stricter setbacks. The act applies uniformly statewide and supersedes any conflicting local setback ordinances within the protected shoreland zone, ensuring consistent water quality protection across all New Hampshire jurisdictions.

Violations & Penalties

DES may issue cease and desist orders, restoration requirements, and administrative fines up to $20,000 plus daily penalties up to $2,000 for continuing violations under RSA 483-B:18.

New Hampshire Shoreland Protection Setback Statute

Key Facts

Full Breakdown

Violations & Penalties

Frequently Asked Questions

Sources

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