Building near the water in Manchester-by-the-Sea, Massachusetts (wetlands rules)
Work within 100 feet of a wetland, beach, dune, coastal bank or other resource area (200 feet of a river or perennial stream) needs a permit from the Conservation Commission under Manchester-by-the-Sea's General Wetlands By-law. The town's regulations bar new structures within 50 feet, and any disturbance within 30 feet, of a salt marsh, wetland, vernal pool, coastal bank or stream bank unless a waiver is granted.
| Buffer zone (Commission review) | 100 ft from wetlands, beaches, dunes, coastal banks, ponds, streams and tidal land [1] |
| Riverfront Area | 200 ft from any river or perennial stream, brook or creek [2] |
| No Build Zone | 50 ft from salt marsh, wetland, vernal pool, coastal bank or stream bank [3] |
| No Disturb Zone | 30 ft from the same resource areas [4] |
| Tree removal | Up to 4 dead or diseased trees, with prior notice to the Commission Administrator [6] |
| Expanding a nonconforming home | No special permit if it doesn't increase the nonconformity; otherwise ZBA special permit [7] |
Where the wetlands bylaw applies
Manchester's General Wetlands By-law (Art. XVII) is stricter than the state Wetlands Protection Act. You can't alter land within 100 feet of any wetland, salt marsh, bog, vernal pool, bank, pond, stream, beach, dune, coastal bank, land under water or land subject to tidal action without Conservation Commission approval [1]. The resource areas themselves, plus land within 200 feet of any river or perennial stream (the Riverfront Area), are also protected [2]. "Alter" includes building, grading, filling, and cutting or trimming trees and shrubs.
No Build and No Disturb Zones
The Commission's regulations set two inner buffers:
- No Build Zone: no new structures within 50 feet of a salt marsh, freshwater wetland, vernal pool, coastal bank, or stream or river bank [3]. Structures include houses, additions, decks, porches, pools, sheds and patios.
- No Disturb Zone: no alteration at all within 30 feet of the same areas [4].
The Commission presumes work in these zones causes harm. Overcoming that takes an alternatives analysis showing there's no practicable alternative, plus a waiver request [5]. Expect mitigation, such as restoring lawn to native plantings.
Trees and vegetation
Removing up to four dead or diseased trees counts as routine tree removal, but only with prior notice to the Commission Administrator [6]. Planting native species, mowing existing lawn and limited vista pruning are minor activities allowed in the buffer zone. Other clearing needs approval.
Expanding an existing home
Under zoning, a single- or two-family home that doesn't meet current setbacks can be extended or altered without a special permit if the work doesn't make it more nonconforming. Otherwise the Zoning Board of Appeals must find the change isn't substantially more detrimental [7]. Wetlands approval is separate.
How to apply
File a Notice of Intent with the Conservation Commission before work, or a Request for Determination of Applicability if you're unsure the bylaw applies. A local filing fee applies on top of the state fee. Floodplain overlay rules in the Zoning By-law also apply in flood zones.
Next steps
- Find out whether your project is within 100 feet of a wetland, beach, dune or coastal bank (200 feet of a river or perennial stream); ask the Conservation Commission if unsure.
- File a Request for Determination of Applicability, or a Notice of Intent with plans and fees, with the Conservation Commission before any work, clearing or grading.
- Keep new structures 50 feet and any disturbance 30 feet from the resource area, or prepare an alternatives analysis and waiver request.
- Check with the Building Department (978-526-2010) about floodplain rules and whether an addition to a nonconforming house needs a ZBA special permit.
Common questions
- Do I need a permit to build near a wetland or beach in Manchester-by-the-Sea, Massachusetts?
- Yes. Work within 100 feet of a wetland, beach, dune, coastal bank or other resource area (200 feet of a river or perennial stream) needs a Conservation Commission permit.
- How close to a wetland can I build in Manchester-by-the-Sea, Massachusetts?
- The regulations bar new structures within 50 feet, and any disturbance within 30 feet, of a salt marsh, wetland, vernal pool, coastal bank or stream bank unless a waiver is granted.
- Can I remove trees near a wetland in Manchester-by-the-Sea, Massachusetts?
- You can remove up to 4 dead or diseased trees, with prior notice to the Commission Administrator.
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
- Art. XVII, Sec. 4.2 Jurisdiction, General By-laws (updated July 15, 2026) incl. Art. XVII General Wetlands By-law and Sec. 20C Short Term Paying Guest in Homes, p. 73
4.2 Except as permitted by the ConCom pursuant to this By-Law or as otherwise allowed by this By-Law, no person shall commence to alter lands within 100 feet of any: freshwater or coastal wetland; salt marsh; wet meadow; bog; swamp; vernal pool; spring; bank; reservoir; lake; pond; stream; beach; dune; estuary; coastal bank; lands under any water body; or land subject to tidal action (“Resource Area Buffer Zone(s)”)
- Art. XVII, Sec. 4.1.2 Jurisdiction, General By-laws (updated July 15, 2026) incl. Art. XVII General Wetlands By-law and Sec. 20C Short Term Paying Guest in Homes, p. 72
4.1.2 lands within 200 feet of any river or perennial stream, brook or creek (“Riverfront Area”).
- Sec. 2.17 No Build Zone, Wetlands Regulations for Administering General By-law Art. XVII (adopted 2/26/2013, amended 8/31/2021), p. 6
2.17 “No Build Zone” means the fifty (50) feet horizontally landward of those Resource Areas included in Sections 2.17.1 and 2.17.2 in which there shall be no construction or installation of any Structures.
- Sec. 2.18 No Disturb Zone, Wetlands Regulations for Administering General By-law Art. XVII (adopted 2/26/2013, amended 8/31/2021), p. 6
The No Disturb Zone includes the area thirty (30) feet horizontally landward of: 2.18.1 the edge of any salt marsh, freshwater wetland or vernal pool; or 2.18.2 the top of coastal bank, or the top of the bank of any stream or river
- Sec. 10.1.1 No Build Zone, Wetlands Regulations for Administering General By-law Art. XVII (adopted 2/26/2013, amended 8/31/2021), p. 15
Any proposals for new Structures in the No Build Zone shall be accompanied by a Waiver Request as defined in Section 12.1.
- Sec. 2.27 Routine Tree Removal, Wetlands Regulations for Administering General By-law Art. XVII (adopted 2/26/2013, amended 8/31/2021), p. 7
2.27 “Routine Tree Removal” means the removal of not more than four dead or diseased trees. Routine tree removal cannot occur without: 2.27.1 prior notification to the Commission Administrator; and
- Sec. 7.2 Changes, Extensions and Alterations, Zoning By-law (compilation dated April 27, 2026), p. 54
The above requirement does not apply to such an extension, alteration, re-construction or structural change to a single family or two family residential structure that does not increase the nonconforming nature of that structure.