Building near the water in Barnstable, Massachusetts (wetlands rules)
Almost any work within 100 feet of a wetland, pond, marsh, beach, coastal bank or flood-prone land needs a permit from the Barnstable Conservation Commission under the town's Wetlands Protection Ordinance (Ch. 237). The Commission's rules require keeping a 50-foot undisturbed natural buffer next to the resource area, and hardscape or landscaping closer than that needs a waiver plus 4:1 mitigation planting. The Commission's regulation also notes zoning construction setbacks of 35 feet from wetlands and 50 feet from mean high water, but we couldn't review the zoning ordinance itself.
| Conservation Commission jurisdiction | Work in or within 100 ft of wetlands, water bodies and flood-prone land [1] |
| Undisturbed buffer | 50 ft from the resource area [3] |
| Zoning construction setbacks (as cited by the Commission) | 35 ft from wetlands; 50 ft from mean high water (coastal) and inland great ponds [2] |
| Mitigation for hardscape 50-100 ft from the resource | 3:1 planting to disturbance (when no 50-ft undisturbed buffer exists) [4] |
| Mitigation for work within 50 ft (waiver required) | 4:1 planting to disturbance [5] |
| Max wetland fill (with replication) | 2,500 sq ft [7] |
| Fine | Up to $300 per day per violation [8] |
What areas are covered
Barnstable's Wetlands Protection Ordinance (Chapter 237) is a local ordinance adopted under home rule, separate from the state Wetlands Protection Act. No one may remove, fill, dredge or alter in or within 100 feet of a surface water body, vegetated or unvegetated wetland, land under water, or land subject to flooding or coastal storm flowage without Conservation Commission approval [1]. "Alter" includes putting up buildings or structures of any kind and cutting trees or other plant life. You need a written permit before starting work, and the Commission holds a public hearing with notice to abutters.
Buffer zone rules
Under the Commission's Chapter 704 regulation, a 50-foot undisturbed buffer must be kept between the resource area and the limit of work [3]. That buffer is natural, unmaintained vegetation: no lawns, gardens, ornamental plantings or hardscape except permitted paths and stairs. If no 50-foot natural buffer exists on your lot, new hardscape in the 50-100 foot zone triggers mitigation planting at 3 times the new hardscape area [4]. Hardscape or landscaping inside the 50-foot buffer needs a waiver, granted only in exceptional, limited circumstances, with planting at 4 times the disturbed area [5]. The Commission can require a wider buffer on slopes over 18%.
Rebuilding existing homes
The Commission may permit rebuilding all or part of an existing structure on its existing foundation or footprint, without expansion or more intensive use, without requiring mitigation planting, if no additional excavation or filling is needed and the structure was either previously approved or built before 1973 [6]. You still need the Commission's approval. Vista pruning, invasive species control and septic repair are treated the same way.
Wetland filling
Filling wetlands is generally prohibited. Replication can't be used to make land buildable, and no more than 2,500 sq ft may be filled [7].
Zoning setbacks
The Commission's regulation notes that the zoning ordinance sets construction setbacks of 35 feet from wetlands and 50 feet from mean high water and inland great ponds [2]. We couldn't review the zoning ordinance itself, including its rules on expanding nonconforming structures.
Violations can be fined up to $300 per day [8].
Next steps
- Call the Barnstable Conservation Commission before any work, clearing or landscaping within 100 feet of a wetland, pond, beach, bank or marsh.
- If you're unsure whether the ordinance applies, file a written Request for Determination with the Commission.
- For regulated work, file a Notice of Intent with plans showing the 50-foot buffer and mitigation planting calculations, notify abutters by certified mail, and attend the public hearing.
- Check zoning setbacks (35 ft from wetlands, 50 ft from mean high water) with the Building Division (508-862-4038) before applying for a building permit.
Common questions
- Do I need a permit to build near a wetland or pond in Barnstable, Massachusetts?
- Yes. Almost any work within 100 feet of a wetland, pond, marsh, beach, coastal bank or flood-prone land needs a permit from the Barnstable Conservation Commission under the Wetlands Protection Ordinance (Ch. 237).
- How big is the buffer next to a wetland in Barnstable, Massachusetts?
- The Commission's rules require a 50-foot undisturbed natural buffer. Hardscape or landscaping closer than that needs a waiver, granted only in exceptional circumstances, plus 4:1 mitigation planting.
- What are the zoning setbacks from wetlands in Barnstable, Massachusetts?
- The Commission's regulation notes zoning setbacks of 35 feet from wetlands and 50 feet from mean high water. The page couldn't review the zoning ordinance itself, so confirm with the Building Division.
- What is the fine for violating the wetlands ordinance in Barnstable, Massachusetts?
- Violations can be fined up to $300 per day.
Massachusetts wetlands rules and the Conservation Commission
Massachusetts has no "shoreland zoning" like some states. Instead, the Wetlands Protection Act (M.G.L. c. 131, §40) and MassDEP's regulations (310 CMR 10.00) control work near water, and your local Conservation Commission enforces them.
What's protected:
- Wetlands, banks, beaches, dunes, marshes, land under ponds and streams, and 100-year floodplains.
- The riverfront area: 200 feet from a perennial river or stream, shrinking to 25 feet in certain dense urban areas.
- The buffer zone: land within 100 feet of a wetland, bank, beach or similar resource area. Most work here needs Conservation Commission review.
How approval works:
- Contact the Conservation Commission before starting any work in these areas. That includes additions, decks, sheds, driveways, regrading and clearing vegetation.
- If you're unsure whether the law applies, file a Request for Determination of Applicability (RDA).
- If the work will affect a resource area, file a Notice of Intent (NOI) with plans and a fee. A public hearing follows, and the commission issues an Order of Conditions approving (with conditions) or denying the project.
- Applicants, abutters, groups of 10 residents or MassDEP can appeal to MassDEP.
Local bylaws can be stricter. Many towns have their own wetlands bylaw with larger buffers or no-build zones, and the Conservation Commission enforces those too.
What the bylaw says
- Ch. 237, § 237-2(A) Jurisdiction, Chapter 237: Wetlands Protection (General Ordinance) (eCode360), p. 1
Except as permitted by the Conservation Commission or as provided in this chapter in § 237-3 , no person shall remove, fill, dredge, or alter in or within 100 feet of the following resource areas: surface water body, vegetated wetland or unvegetated wetland; any land under said waters; and any land subject to flooding or inundation by groundwater, surface water, tidal action or coastal storm flowage.
- Ch. 704 Preamble, A. Introduction, Chapter 704: Regulation Governing Activity in the 100 ft Buffer Zone (Conservation Commission), p. 1
Moreover, the Town of Barnstable Zoning Ordinance embraces several construction setbacks from wetlands (35’) and MHW in coastal areas and inland great ponds (50’).
- § 704-3(A), Chapter 704: Regulation Governing Activity in the 100 ft Buffer Zone (Conservation Commission), p. 5
A 50 ft undisturbed buffer zone shall be retained between the landward-most wetland resource areas and the limit of proposed site disturbance.
- § 704-3(D), Chapter 704: Regulation Governing Activity in the 100 ft Buffer Zone (Conservation Commission), p. 5
b. Multiply the area found in 704-3D(a) by 3 to obtain the area of required mitigation at a 3:1 planting to disturbance ratio.
- § 704-4(B)(1), Chapter 704: Regulation Governing Activity in the 100 ft Buffer Zone (Conservation Commission), p. 6
b. Multiply the area found in Section 704-4(B)(1)a by 4 to obtain the area of required mitigation at a 4:1 planting to disturbance ratio.
- § 704-6(A)(4), Chapter 704: Regulation Governing Activity in the 100 ft Buffer Zone (Conservation Commission), p. 8
(4) The construction or reconstruction, without expansion or intensification of use, of all or a portion of a previously existing structure which utilizes a pre-existing foundation or footprint without need of additional excavation or filling, and either: (a) is approved, or (b) was constructed prior to 1973;
- Ch. 237, Wetlands replication (D), Chapter 237: Wetlands Protection (General Ordinance) (eCode360), p. 1
No more than 2,500 square feet of wetland may be filled in accordance with this section. The replicated wetland must be at least equal in size to the wetland that is filled and properly vegetated.
- Ch. 237, Enforcement (E), Chapter 237: Wetlands Protection (General Ordinance) (eCode360), p. 1
Any person who violates any provision of this chapter, regulations thereunder, or permits issued thereunder, shall be punished by a fine of not more than $300. Each day or portion thereof during which a violation continues shall constitute a separate offense, and each provision of the chapter, regulations or permit violated shall constitute a separate offense.