Docks in Non-Tidal Areas FAQs

Yes. This requirement also includes other docking structures such as boathouses. Within or on the banks of state surface waters, you need a wetlands permit.

Swim rafts and moorings do not require this permit. However, to install them you must still comply with all applicable state laws and rules adopted by the state Department of Safety. For more information, please consult the Department of Safety’s Mooring Program.

The state holds lakes and ponds larger than 10 acres, as well as navigable rivers, "in trust" for general public. To install a dock in public waters means placing it in or on public lands and waters. We are responsible for ensuring that private structures in public water avoid unreasonable adverse impacts on the general public interest. We manage this responsibility in part through applications and permit processes.

Before you change the size, location or configuration (footprint) of an existing, legal dock or its structure(s), you need a wetlands permit.

To change only your construction materials, if you comply with all three conditions below, you do not need a wetlands permits:

• You avoid changing the size, location or configuration (footprint) of the dock.
• At the time of repair, you avoid work on any portion of the structure below the water surface.
• You conduct no work in a tidal area.

Common examples of changing construction materials include:

• Replacing wood decking with composite decking.
• Replacing a wooden seasonal dock with an aluminum seasonal dock.

Docks require wetlands permits for repairs that result in changes to their "footprints" (size, location, configuration).

Some repairs do not require wetlands permits if they are on portions of a dock that are exposed (in "the dry") and the lakebed is not disturbed.

Tips for these and other work within New Hampshire's protected shoreland are also available in a short video playlist.

This table shows the maximum standard dimensions for docks. Docks cannot exceed these dimensions.

“Shoreline frontage” means the average of the length of a straight line drawn between the points where the side property lines intersect the reference line and the length of the natural frontage between the same points.

^{The shoreline frontage is the average of the black and blue dotted lines, measured between the property lines.}

Permanent docks, such as piling or crib docks, are permitted only on lakes greater than 1,000 acres in size and only in areas where wind or wave conditions prevent the use of a seasonal dock, based on pre-determined criteria. Seasonal docks are less disturbing on lakes as they are removed during the winter months and do not require the use of aerators for protection against ice damage. The use of aerators disrupts normal lakes cycles and creates dangerously thin ice, a hazard to snowmobilers and ice fisherman.

Permits may be obtained from NHDES to relocate rocks that are navigational hazards. A rock is considered a navigational hazard to the owner if:

• It is within a boatslip or the approach to a docking structure; and
• It is within 3 feet of the water’s surface.

Dredging of sediments can be permitted only in and around existing, legal fixed structures such as boathouses or breakwaters which cannot be easily modified to attain necessary water depths for docking.

A boat slip is a predetermined, waterbody-dependent, volume of water. For waterbodies 10,000 acres or less, a boat slip is a volume of water 20 feet long, 6 feet wide, and 3 feet deep. For waterbodies greater than 10,000 acres, a boat slip is a volume of water 25 feet long, 8 feet wide and 3 feet deep. Note that only one lake in New Hampshire is greater than 10,000 acres: Lake Winnipesaukee. State rules allow for up to two feet of navigation space around a boat slip. Water depth is measured at the normal high water mark (Figure 2).

Yes, a wetlands permit is required to install all boat lifts and jet ski lifts, whether seasonal boat or permanent. One boat lift or jet ski lift is equivalent to a single boat slip.

Yes. Only seasonal canopies may be permitted and:

• The canopies must not interfere with boating safety by obstructing lines of sight necessary for navigation.
• All parts of the canopies must be readily removed at the end of the boating season, prior to ice-in.
• And the canopy must not be installed prior to ice-out.
   

No. For lakes or ponds larger than 10 acres, the state owns the bed of the lake. Your permit allows you to install your dock on or over state land.

For other freshwater lakes, ponds and rivers, the state holds the waters "in trust" for the public. Your permit allows your dock to "interfere" with the public’s right to these waters. Ownership of the bed of these waterbodies depends on several factors. The most important factor is what your deed conveys to the property abutting the waters.

The Shoreland Water Quality Protection Act (RSA 483-B) and associated rules, Env-Wq 1400, apply to New Hampshire's protected shoreland areas. 

Proposed projects within these areas typically require a shoreland permit. Proposed projects within the bank of a waterbody, such as docks, may require a wetland permit.

If you already have a dock, please consider registering it. It could help you save time and money. For more details about new dock permitting, please refer to our fact sheet or these short videos.

Older docks, as well as newer ones, may benefit from voluntary dock registration. Docking structures may be recognized as legally existing if they were in place before the start of any legal requirement to obtain a state permit and:

• Have been continuously maintained with no change to its location, size and configuration or is a legal replacement structure.
• Have not been abandoned for more than five years.
• Are consistent with the public’s right to reasonable use of public waters, as described in state law.
• Are not built on land created by the unauthorized filling of public waters (converting public waters to land).

Permitting started June 22, 1967, for docking structures adjacent to tidal waters; July 2, 1969, for freshwater permanent docking structures; and September 4, 1978, for freshwater seasonal docking structures. For more information, please refer to tips for docking structures in this short video playlist.

Structures associated with or that constitute fill in public waters (converting public waters to land) may require a Grant of Right from Governor and Council pursuant to RSA 482-A:17.