Waterfront permitting in New Hampshire is not one rule. Here is the authority that controls the permit, what rides along with it, and the official source — before you build anything.
Seasonal docks have strict size limits. Stairs to a dock up to 6 feet wide can skip the wetlands permit, but the protected shoreland rules within 250 feet still apply.
The state agency below is the main permit path. Lake operators that can be the real gate here: NHDES + local municipality.
| Project | What the rule says | Citation |
|---|---|---|
| Seasonal Dock | A qualifying seasonal dock on a lake or pond may use the statutory seasonal-dock exemption/notice path when all criteria are met. | Env-Wt 308.02(i); RSA 482-A:3, IV-a |
| Seasonal Dock | Seasonal dock dimensional path depends on frontage and waterbody size. Parcels with under 75 feet of frontage are limited to 4 ft × 24 ft; with qualifying frontage on waterbodies under 1,000 acres, the standard seasonal maximum is 6 ft × 30 ft. | Seasonal dock dimensions |
| Seasonal Dock | On a waterbody 1,000 acres or larger, qualifying seasonal dock maximum dimensions are 6 feet wide by 40 feet long. | Seasonal dock dimensions |
| Seasonal Dock | Qualifying seasonal dock must be removed for at least five months during the non-boating season. | Removal period |
| Seasonal Dock | Qualifying seasonal dock parcel must have at least 75 feet of shoreline frontage and dock must be at least 20 feet from an abutting property line or its imaginary extension over the water. | Frontage / property line |
| Seasonal Dock | Qualifying seasonal dock must require no shoreline modification, regrading or recontouring and must not be in or within 100 feet of a municipally designated prime wetland. | Shoreline modification / prime wetland |
| Permanent Dock | Permanent docks are permissible only on waterbodies exceeding 1,000 acres where conditions inhibit safe maintenance of a seasonal structure. The rule sets a 6 ft × 30 ft permanent-dock cap on 1,000+ acre waterbodies; Standard Wetlands Permit review is required. | Permanent docks |
| Stairs to Dock | Stairs to a dock can be constructed without wetlands permitting if no wider than 6 feet, built over the bank without regrading/recontouring, and no portion extends over or under water. | Dock access stairs |
| Shoreland Work | Protected Shoreland generally includes land within 250 feet of lakes/ponds >10 acres, 4th-order and greater streams/rivers and most designated rivers, and tidal waters. | RSA 483-B |
| Seasonal Dock | NHDES identifies Seasonal Dock Notification for Lakes and Ponds, form NHDES-W-06-035, as the seasonal notice route when eligibility criteria are satisfied. | NHDES-W-06-035 |
Sources: USACE Regulatory Request System · EPA — CWA §401 · USACE Nationwide Permits · Last verified 2026-09-14
Contacts read on each office's official site · verified 2026-10-30. Call before you design: many offices route dock questions by region or by lake.
New Hampshire Department of Environmental Services — des.nh.gov · New Hampshire Department of Environmental Services (second source) — des.nh.gov · Last verified 2026-09-14
Questions? Call 207-600-2705.
Preliminary regulatory path. Ask Dock.AI is an information tool, not a permitting authority. Rules change and every waterbody has its own owner and wrinkles. Confirm your project with the listed authority before you build. You pull your own permit; we show you the path. Ask Dock.AI is powered by Alummikon — engineered aluminum docks, stairs and waterfront access, built in Maine.
Disclaimer : Ask Dock.AI is an information tool, not a permitting authority. Always confirm requirements with the governing agency before construction.
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