Dock, pier and float rules in Falmouth, Massachusetts
Possibly, but only with a Conservation Commission permit under strict standards (from the town's 2014 wetland regulations, which may have changed). In Falmouth's recreational harbors, a private dock can extend no more than 100 feet beyond mean high tide (or the edge of salt marsh), the end float or "L"/"T" can't exceed 100 sq ft, and the water at the end must be at least 3 feet deep at mean low water. New docks are barred within 50 feet of eelgrass and near productive shellfish beds, and in V-zones and ACECs unless there's a public benefit.
| Max length (recreational harbors) | 100 ft beyond mean high tide or the landward edge of salt marsh [2] |
| Min water depth at end of dock | 3 ft at mean low water [2] |
| Max terminal L/T or float area | 100 sq ft [3] |
| Setback from property line (extended) | 10 ft [3] |
| Distance from eelgrass | No new or replacement dock within 50 ft [5] |
| V-zone and ACEC/DCPC docks | Only with demonstrated public benefit [4] |
| Permit term | 3 years initially; renewable for 5 years [7] |
Who approves
Falmouth regulates docks mainly through the Conservation Commission under the town Wetlands Bylaw (Chapter 235) and its regulations. The regulations find that docks can harm shellfish, fisheries, marshes, storm-damage protection and recreation. An application must include a shellfish survey, a detailed plan with water depths, and review of navigation effects by the Harbor Master [1]. Separately, the residence-district zoning use table lists "Piers, Floats, and Docks" as allowed in every residence district "with the approval by the Conservation Commission and the Board of Selectmen as a common pier, float, or dock" [8]; the table row is split across lines in our copy, so ask whether a private dock also needs Select Board sign-off.
Size and design (recreational harbors)
- No longer than 100 feet beyond mean high tide, or 100 feet beyond the landward edge of salt marsh. A dock also can't impede passage along the beach or navigation [2].
- Water at the end of the dock at least 3 feet deep at mean low water [2]. Floating sections need 3 feet under them even at extreme low water.
- The terminal "L" or "T" or float is limited to 100 sq ft, and no part may be within 10 feet of the property line extended into the water [3].
- Cross marshes on a raised walkway and coastal banks on stairs. No CCA-treated lumber is allowed, and lighting is limited to 0.2 footcandle.
Where new docks are restricted
New docks aren't allowed in a FEMA velocity (V) zone [4], or in an ACEC or District of Critical Planning Concern [6], unless you show a public benefit. None are allowed within 50 feet of eelgrass [5], or where significant shellfish are found within 35 feet of the proposed mooring area.
Seasonal docks and conditions
Seasonal docks and floats must be stored in upland areas off-season. The permit must be recorded at the Barnstable Registry of Deeds within 30 days. Initial permits last 3 years and can be renewed for 5 years if there's no measurable harm [7]. Inland pond docks fall under a separate section, FWR 10.53.
State and federal permits
The town permit doesn't replace state and federal approvals. Most docks also need a Chapter 91 license from MassDEP and may need U.S. Army Corps approval. These regulations date from the town's 2014 compilation.
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Next steps
- Talk to the Conservation Commission office before designing; ask whether your shoreline is in a V-zone, ACEC or near eelgrass or shellfish beds.
- Hire an engineer and shellfish surveyor to prepare the plan, water-depth survey and shellfish survey required by FWR 10.16(1)(b).
- Get the Harbor Master's review of navigation effects, then file a permit application with the Conservation Commission.
- After approval, record the permit at the Barnstable Registry of Deeds within 30 days and apply for the state Chapter 91 license.
Common questions
- Can I build a private dock in Falmouth, Massachusetts?
- Possibly, but only with a Conservation Commission permit under strict standards from the town's 2014 wetland regulations, which may have changed.
- How long can a dock be in Falmouth, Massachusetts?
- In recreational harbors, a private dock can extend no more than 100 feet beyond mean high tide or the edge of salt marsh. The end float or L/T can't exceed 100 sq ft.
- How deep must the water be at the end of a dock in Falmouth, Massachusetts?
- At least 3 feet at mean low water.
- Where are new docks banned in Falmouth, Massachusetts?
- New docks are barred within 50 feet of eelgrass and near productive shellfish beds, and in V-zones and ACECs unless there is a public benefit.
Massachusetts state rules for docks and piers
A private dock in Massachusetts usually needs several layers of approval beyond local zoning.
Chapter 91 waterways license (MassDEP): any structure, regardless of size, permanent or seasonal, in tidal waters, in a great pond (a pond over 10 acres in its natural state), or in certain navigable rivers needs Chapter 91 authorization (M.G.L. c. 91; 310 CMR 9.00). For small residential docks there are simpler routes:
- a General License certification for pile-supported residential docks, piers, ramps and floats with no fill or dredging, outside ACECs and Designated Port Areas (310 CMR 9.29)
- a Simplified License for residential docks up to 600 sq ft below the high-water line (310 CMR 9.10)
Licenses must be recorded at the Registry of Deeds, and Chapter 91 protects public rights to fish, fowl and navigate.
Conservation Commission: dock work in or near wetlands, banks or land under water needs an Order of Conditions under the Wetlands Protection Act (c. 131, §40).
Harbormaster: bottom-anchored moorings, floats and rafts (no pilings) can be authorized by an annual permit from the local harbormaster instead of a Chapter 91 license (c. 91, §10A). Mooring fees can't discriminate based on residence.
U.S. Army Corps of Engineers: work in navigable waters may also need federal approval. Small private piers and floats are often covered by the Corps' Massachusetts General Permits, which can involve self-verification or pre-construction notification.
What the bylaw says
- FWR 10.16(1)(b)(5)-(6) Submission Requirements for all Docks, Falmouth Wetland Regulations FWR 10.00 (Conservation Commission; 2014 compilation), p. 42
5. The dock's effect on navigation reviewed and approved by the Harbor Master; 6. A shellfish survey conducted in accordance with FWR 10.34 (4);
- FWR 10.16(1)(d)(1)-(2) Recreational Harbors, Falmouth Wetland Regulations FWR 10.00 (Conservation Commission; 2014 compilation), p. 43
1. Docks shall not exceed over 100 feet in length beyond mean high tide, or 100 feet in length beyond the landward edge of salt marsh, or otherwise prohibit or unreasonably impede legitimate passage along a beach or through navigation over the waters for recreational or aquacultural purposes; 2. To keep disturbance of the bottom minimal at all times during both construction and use, the water depth at the end of the dock shall be a minimum of three feet at the time of mean low water;
- FWR 10.16(1)(d)(3), (5) Recreational Harbors, Falmouth Wetland Regulations FWR 10.00 (Conservation Commission; 2014 compilation), p. 43
3. The area of the terminal "L" or "T" shape in a fixed dock, or the float, or combination thereof, shall not exceed 100 square feet; 4. The design and construction shall not interfere with recreational intertidal lateral access; 5. No portion of the dock or pier may be closer than 10 feet from the property boundary or extended property boundary line into the intertidal and tidal zone;
- FWR 10.16(1)(h)(1) General Requirements and Prohibitions, Falmouth Wetland Regulations FWR 10.00 (Conservation Commission; 2014 compilation), p. 46
1. No new docks or piers or extension of an existing dock or pier may be constructed in any portion of FEMA designated velocity zone (V-Zone) unless the applicant demonstrates that there will be public benefit from the project.
- FWR 10.16(1)(h)(5)-(6) General Requirements and Prohibitions, Falmouth Wetland Regulations FWR 10.00 (Conservation Commission; 2014 compilation), p. 46
5. No new, replacement, or substantial alteration of an existing dock or pier shall be permitted within 50 feet of an area of eel grass (Zostera marina). 6. No CCA-treated materials may be used to construct a dock or pier.
- FWR 10.16(1)(e)(1) ACECs and DCPCs, Falmouth Wetland Regulations FWR 10.00 (Conservation Commission; 2014 compilation), p. 44
1. No new docks shall be allowed unless the applicant demonstrates that a public benefit will derive from the construction of the dock or pier.
- FWR 10.16(1)(j)(1) Permits, Falmouth Wetland Regulations FWR 10.00 (Conservation Commission; 2014 compilation), p. 47
1. Initial permits will be granted for a period of three years. After the initial period has expired the Conservation Administrator may issue a renewal of the permit for a period of five years provided there is no measurable adverse impact from the use of the pier or dock on any resource area protected by the bylaw.
- § 240-6.6B Residence Districts Use Table, Other Principal Uses, Zoning Bylaw, Town Code Chapter 240, Articles 1-14 (November 2022 recodification), p. 55
Piers, Floats, and Docks with the approval by the Conservation Y Y Y Y Y