Building near the water in Hamilton, Massachusetts (wetlands rules)
Work near a wetland, pond, lake or stream in Hamilton needs a permit from the Conservation Commission. The town's wetlands bylaw sets a no-disturbance zone and a no-build zone next to wetlands: on residential lots that were occupied, or had a house building permit, by December 31, 2007, nothing may be disturbed within 25 feet and nothing built within 50 feet; on other lots those limits are 50 and 75 feet.
| Local buffer (AURA) | 100 feet from wetlands, ponds of any size, lakes and banks [1] |
| Riverfront area | 200 feet from perennial rivers and streams [2] |
| No-disturbance / no-build zones (lots occupied or permitted by Dec 31, 2007) | 25 feet / 50 feet from the wetland edge [5] |
| No-disturbance / no-build zones (all other lots) | 50 feet / 75 feet from the wetland edge [6] |
| Permit | Conservation Commission permit before any work in a resource area [3] |
| Tree/vegetation removal | Counts as altering a resource area [7] |
Where the rules apply
These rules come from the wetlands bylaw as approved at the April 2023 Town Meeting and the Commission's July 2021 regulations. Hamilton has no ocean shoreline; the rules here cover its wetlands, ponds (including Chebacco Lake) and rivers. The local wetlands bylaw protects wetlands, vernal pools, banks, lakes, ponds of any size and land under water, plus an Associated Upland Resource Area (AURA) extending 100 feet out from those areas [1]. Land within 200 feet of a perennial river or stream is protected as riverfront area [2].
Permits
No one may build on, fill, dredge or otherwise alter these areas without the Conservation Commission's permission, and no work may start until you have a permit [3]. If you aren't sure whether your project is covered, you can file a Request for Determination of Applicability (RDA). Small projects in the AURA, like a small house addition or shed, can often be reviewed on an RDA with an owner-drawn plan [8].
No-disturbance and no-build zones
Work within 100 feet of a wetland must overcome a strong presumption of harm, and building construction of any kind (homes, porches, decks, additions, sheds) is prohibited in the no-build zone [4]. Driveways and fences may be allowed after review.
- For residential lots occupied, or with a house building permit, by December 31, 2007: no disturbance within 25 feet of the wetland edge, no building within 50 feet [5].
- All other cases: no disturbance within 50 feet, no building within 75 feet [6].
- The entire 100-foot AURA around a vernal pool is a no-disturbance zone.
Clearing trees and vegetation
The bylaw counts cutting or removing ground cover, shrubs or trees (even invasive ones) as "altering" a resource area [7], so clearing in the AURA needs a permit. Trees to be removed must be marked on your plan and flagged; removing unmarked trees can bring a fine of up to $300.
Zoning and existing homes
The zoning bylaw requires buildings and structures to be set back far enough from a watercourse, stream, swamp or floodway to keep flood areas unobstructed. Changes to a nonconforming home go to the Zoning Board of Appeals under Section 5.3, but wetlands permits are still needed separately. The Flood Plain Overlay District (Section 9.2) adds rules in mapped flood zones.
Next steps
- Check whether your project is within 100 feet of a wetland, pond or lake, or 200 feet of a perennial stream (the Conservation Commission can help).
- For small work in the buffer only, file a Request for Determination of Applicability with a sketch plan showing distances to the wetland and any trees to be removed.
- For larger projects, hire an engineer and file a permit application (Notice of Intent) with the Conservation Commission; a public hearing follows.
- Do not start work, cut trees or regrade until the Commission issues its permit or determination.
Common questions
- Do I need a permit to build near a wetland or pond in Hamilton, Massachusetts?
- Yes. Work near a wetland, pond, lake or stream needs a permit from the Conservation Commission.
- How close to a wetland can I build in Hamilton, Massachusetts?
- On residential lots occupied or permitted by December 31, 2007, nothing may be disturbed within 25 feet and nothing built within 50 feet. On other lots those limits are 50 and 75 feet.
- What is the buffer around wetlands in Hamilton, Massachusetts?
- The local buffer is 100 feet from wetlands, ponds of any size, lakes and banks, and 200 feet from perennial rivers and streams.
- Can I cut trees near a wetland in Hamilton, Massachusetts?
- Tree and vegetation removal counts as altering a resource area, so don't cut trees until the Commission issues its permit or determination.
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. XVII, Sec. 2(2), General Wetlands Protection/Conservation Bylaw (Chapter XVII; compilation dated August 7, 2023), p. 3
The term “Associated Upland Resource Area” (“AURA” hereafter) means that area of land extending 100 feet horizontally outward from the boundary of any freshwater wetlands, marshes, wet meadows, bogs, swamps, vernal pools, springs, banks, reservoirs, lakes, ponds of any size, and lands under water bodies.
- Ch. XVII, Sec. 3, General Wetlands Protection/Conservation Bylaw (Chapter XVII; compilation dated August 7, 2023), p. 5
lands adjoining perennial rivers, streams, brooks and creeks out to a distance of 200 feet as outlined by the Wetlands Protection Act known as the riverfront area;
- Ch. XVII, Sec. 5, General Wetlands Protection/Conservation Bylaw (Chapter XVII; compilation dated August 7, 2023), p. 6
No activities shall commence without receiving and complying with a permit issued pursuant to this bylaw.
- Ch. XVII, Sec. 7(D), General Wetlands Protection/Conservation Bylaw (Chapter XVII; compilation dated August 7, 2023), p. 9
Building construction of any kind is prohibited in the no-building zone.
- Ch. XVII, Sec. 7(D)(1), General Wetlands Protection/Conservation Bylaw (Chapter XVII; compilation dated August 7, 2023), p. 9
The no disturbance zone shall be bounded by the edge of the wetlands resource area and a line 25 feet away from the wetlands resource area; and the no build zone shall extend from the no disturbance zone to a line 50 feet from the edge of the wetlands resource area for Residential lots actually occupied on December 31, 2007;
- Ch. XVII, Sec. 7(D)(2), General Wetlands Protection/Conservation Bylaw (Chapter XVII; compilation dated August 7, 2023), p. 9
In all other cases, the no disturbance zone shall be bounded by the edge of the wetlands resource area and a line 50 feet away from the wetlands resource area; and the no build zone shall extend from the no disturbance zone to a line 75 feet from the edge of the wetlands resource area.
- Ch. XVII, Sec. 2(1)(C), General Wetlands Protection/Conservation Bylaw (Chapter XVII; compilation dated August 7, 2023), p. 3
destruction of vegetation, including cutting and removing of ground cover, shrubs or live or dead trees; without regard to whether such vegetation might be defined as invasive.
- Conservation Bylaw Regulations, Sec. VI(A), Conservation Bylaw Regulations (July 15, 2021), p. 7
These small project guidelines apply to small additions to a single family house within an AURA, minor landscaping projects near, but not in, wetlands areas and outside the no disturbance zone, small detached structures, and similar projects.