Building near the water in Wellesley, Massachusetts (wetlands rules)
Building, filling or altering land within 100 ft of a wetland, pond or stream, or within 200 ft of a perennial river or stream, needs a permit from Wellesley's Wetlands Protection Committee. Its regulations bar almost all work within 25 ft of a water body, bank or vegetated wetland (the 25-foot No Disturbance Zone) unless you get a waiver.
| Buffer zone (local bylaw jurisdiction) | Land within 100 ft of wetlands, ponds, streams and banks [1] |
| Perennial streams and rivers | Jurisdiction extends 200 ft [1] |
| Isolated wetlands covered | At least 2,500 sq ft [1] |
| No Disturbance Zone | 25 ft from water bodies, banks and vegetated wetlands [3] |
| Tree removal in buffer zone | 1 native replacement tree (at least 1.5 in. caliper) per tree of 5 in. dbh or larger removed [4] |
| Permit term | 3 years, extendable [5] |
The Wetlands Protection Regulations we reviewed are dated May 2017; a 2024 revision was circulated for review, so confirm with the Natural Resources Commission which version is in force.
What areas are covered
Wellesley has no shoreland zoning; instead, its Wetlands Protection Bylaw (Town Bylaws Article 44) covers marshes, swamps, banks, lakes, ponds, rivers, streams and the land under them, bordering wetlands, isolated wetlands of at least 2,500 sq ft, vernal pool habitat, land subject to flooding, land within 100 ft of those resource areas, and land within 200 ft of perennial streams or rivers [1]. The bylaw is administered by the Wetlands Protection Committee, and no regulated activity may start without its permit [2].
The 25-foot No Disturbance Zone
Under the Committee's regulations, no activity is allowed within 25 ft of water bodies, banks or vegetated wetlands, and work elsewhere in the buffer zone must keep at least 25 ft of undisturbed natural vegetation and soil next to the resource area [3]. Work inside that zone requires a waiver. Some minor work further out (private unpaved paths, wildlife-friendly fences, stone walls, cordwood, native plantings on existing lawn) is exempt if it is at least 25 ft from the resource area and 50 ft from a perennial stream.
Trees and vegetation
Removing a tree 5 inches in diameter or larger in the buffer zone requires planting one replacement tree for each tree removed [4]; replacements must be native, at least 1.5-inch caliper, and monitored for two growing seasons, or you can propose an equivalent native-planting mitigation plan. Mowing and maintaining existing lawn and gardens isn't regulated, but expanding them is.
Permits and flood zones
Permits are issued after a public hearing with abutter notice and expire after three years, though the Committee can extend them [5]. In the Flood Plain or Watershed Protection Districts, the Zoning Bylaw bars new buildings and any change that increases ground coverage, except as allowed by special permit [6].
Next steps
- Check whether your project is within 100 ft of a wetland, pond or stream (200 ft of a perennial stream) using the town's GIS maps, or ask the Natural Resources Commission staff.
- If unsure, file a Request for Determination of Applicability with the Wetlands Protection Committee.
- For regulated work, file a Notice of Intent (accepted for both state and local review) with plans showing resource areas, the 25-ft No Disturbance Zone and the limit of work, and notify abutters within 300 ft by certified mail.
- After approval, record the permit at the Norfolk Registry of Deeds and certify the recording to the Committee before starting work.
- If your lot is in the Flood Plain or Watershed Protection District, also apply to the Building Department and expect a special permit for new construction.
Common questions
- Do I need a permit to build near a wetland in Wellesley, Massachusetts?
- Yes. Building, filling or altering land within 100 ft of a wetland, pond or stream, or within 200 ft of a perennial river or stream, needs a permit from the Wetlands Protection Committee.
- How close to water can I build in Wellesley, Massachusetts?
- The regulations bar almost all work within 25 ft of a water body, bank or vegetated wetland, the No Disturbance Zone, unless you get a waiver.
- Do I need to replace trees I remove near wetlands in Wellesley, Massachusetts?
- Yes. 1 native replacement tree, at least 1.5 in. caliper, is required per tree of 5 in. dbh or larger removed in the buffer zone.
- How long does a wetlands permit last in Wellesley, Massachusetts?
- 3 years, extendable.
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
- Town Bylaws Art. 44.2 Jurisdiction, Town Bylaws Article 44 - Wetlands Protection, p. 1
44.2. Jurisdiction. Except as permitted by the Wetlands Protection Committee or as provided in this bylaw, no person shall remove, fill, dredge, build upon, or alter any of the following resource areas; marshes; wet meadows; bogs; swamps; banks; reservoirs; lakes; ponds; rivers; streams; creeks; lands under reservoirs, lakes, ponds, rivers, creeks or streams; any wetlands bordering on any of the aforesaid resource areas; isolated wetlands so long as they cover at least 2,500 square feet of surface area; land within 100 feet of the aforesaid resource areas; vernal pool habitats; lands within 200 feet of perennial streams or rivers; bordering land subject to flooding; or isolated land subject to flooding.
- Town Bylaws Art. 44.5, Town Bylaws (as amended through ATM 2026), p. 54
No activities shall commence without receiving and complying with a permit pursuant to this bylaw.
- Wetlands Protection Regulations Sec. 2.5(4)(a)1, Wetlands Protection Regulations (effective May 4, 2017), p. 46
1. No activity shall be allowed within the 25-foot No Disturbance Zone (i.e., land within 25 feet of the limit of Water Bodies and Waterways, Bank, or Vegetated Wetlands) and any work proposed within the Buffer Zone shall be designed to retain and preserve a minimum of 25 feet of undisturbed natural vegetation and soil adjacent to the limit of Water Bodies and Waterways, Bank, and Vegetated Wetlands.
- Wetlands Protection Regulations Sec. 2.5(4)(a)3, Wetlands Protection Regulations (effective May 4, 2017), p. 46
3. Work within the Buffer Zone that does not meet the wildlife habitat assessment threshold at Section 2.5(4)(a)2. above that results in the removal of a tree or trees (dbh 5 inches or larger) within the Buffer Zone shall require the planting of one replacement tree for each tree that is removed. The proposed replacement tree(s) shall be of a native species, have a caliper of at least 1.5 inches, be located to optimize the contribution to the Bylaw Interests and Values, and be monitored for two growing seasons after planting.
- Town Bylaws Art. 44.7, Town Bylaws (as amended through ATM 2026), p. 55
A permit shall expire three years from the date of issuance. The Committee may extend a permit for one or more periods of up to three years each, upon written request made at least 30 days prior to the expiration of the permit.
- Zoning Bylaw Sec. 3.7.E.1.a, Zoning Bylaw (as amended through 2025 Annual Town Meeting), p. 123
a. In Flood Plain or Watershed Protection Districts, except as provided in Section 3.7.E.4 below, no new building or structure shall be constructed or used in whole or in part, and no existing building or structure lying wholly within a designated Flood Plain or Watershed Protection District shall be altered, enlarged, reconstructed or used in a manner which would increase ground coverage within the Flood Plain or Watershed Protection District;