Building near the water in Lincoln, Massachusetts (wetlands rules)
Lincoln's local Wetlands Protection Bylaw goes further than state law. Any work within 100 feet of a wetland, pond or stream, or 200 feet of a river or perennial stream, needs a permit (an Order of Conditions) from the Conservation Commission. Within 50 feet of most wetlands and ponds, the Commission presumes work will cause harm unless you prove otherwise with clear and convincing evidence. On lots created after March 29, 2003, it won't allow permanent structures anywhere in the buffer.
| Buffer zone (wetlands, ponds, intermittent streams) | 100 ft [1] |
| Riverfront area (rivers, perennial streams) | 200 ft [1] |
| Presumed-harm zone | 50 ft from wetlands, ponds, intermittent streams; 100 ft from vernal pools, rivers, perennial streams [2] |
| Permit | Order of Conditions from the Conservation Commission before work begins [3] |
| Vegetated buffer strip the Commission may require | At least 50 ft (100 ft for rivers/perennial streams) [5] |
| New lots (after March 29, 2003) | No permanent structures in the 100/200-ft buffer [4] |
| Extra scrutiny | Over 400 sq ft of new impervious surface in the buffer, or closer than 70 ft (120 ft for rivers) [6] |
What areas are covered
Lincoln's Wetlands Protection Bylaw (General Bylaws Article XVIII) regulates work in wetlands and in the land around them. That includes land within 200 feet of any river or perennial stream and within 100 feet of any wetland, vernal pool, bank, pond, lake, intermittent stream or floodplain [1]. The local definition of "pond" has no minimum size, so even small ponds count. The bylaw regulates "altering" these areas, which includes cutting or trimming trees and shrubs, not just building [9].
How strict it is
For most building, filling or other alteration within 50 feet of a wetland, pond or intermittent stream, the Commission presumes significant harm. The same applies within 100 feet of a vernal pool, river or perennial stream. You must show clear and convincing evidence that harm won't occur [2]. You must file a Notice of Intent, and no work can start until you get an Order of Conditions and comply with it [3]. If you're unsure whether your project is covered, file a Request for Determination of Applicability.
Under its buffer regulations, the Commission:
- won't permit permanent structures in the buffer on lots created after March 29, 2003 [4]
- may require an undisturbed vegetated strip at least 50 feet wide (100 feet for rivers and perennial streams), where sheds, pools, lawn and tree removal are prohibited [5]
- requires clear and convincing evidence of no harm if new paved or semi-paved surface in the buffer exceeds 400 sq ft or comes within 70 feet of the wetland (120 feet for rivers) [6]
On older lots or ones with existing structures, the Commission may allow additions in the buffer, often in exchange for new plantings.
Zoning overlay
All ponds and streams sit in the W-Wetland and Watershed Protection zoning district [7]. Most new uses there need a special permit from the Board of Appeals after Conservation Commission review. Accessory uses and buildings, and structures that existed (or had building permits) on December 3, 1973, are exempt from those use rules, though Conservation Commission permits still apply. You can alter or expand an existing nonconforming home by right if the change doesn't make it more nonconforming [8].
Next steps
- Find out whether your project is within 100 ft of a wetland, pond or stream, or 200 ft of a river or perennial stream. Ask the Conservation Commission if unsure.
- File a Request for Determination of Applicability for minor work, or a Notice of Intent with plans and the local filing fee for anything more.
- Notify abutters within 300 ft by certified mail and send copies to the Planning Board, Board of Health and Building Inspector.
- Record the Order of Conditions at the Middlesex South Registry of Deeds before starting work, and request a Certificate of Compliance when finished.
Common questions
- Do I need a permit to build near a wetland or pond in Lincoln, Massachusetts?
- Yes. Any work within 100 feet of a wetland, pond or stream, or 200 feet of a river or perennial stream, needs an Order of Conditions from the Conservation Commission.
- How close to a wetland can I build in Lincoln, Massachusetts?
- Within 50 feet of most wetlands and ponds, the Commission presumes work will cause harm unless you prove otherwise with clear and convincing evidence.
- Can I build a permanent structure in the wetland buffer in Lincoln, Massachusetts?
- On lots created after March 29, 2003, the Commission won't allow permanent structures anywhere in the buffer.
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. XVIII Wetlands Protection, Sec. 2.A, General By-laws (amended through March 29, 2025 ATM), p. 45
or the following upland buffer zone resource areas: lands within two-hundred (200) feet of any river or any perennial stream, brook or creek (the “Riverfront Area”), and lands within one-hundred (100) feet of any freshwater wetland marsh, wet meadow, bog, swamp, vernal pool, bank, reservoir, lake, pond, intermittent stream, brook or creek, lands under any water body and land subject to flooding or inundation by groundwater or surface water.
- Art. XVIII Wetlands Protection, Sec. 2.B, General By-laws (amended through March 29, 2025 ATM), p. 45
B. It shall be presumed that significant adverse effects on the values of a resource area protected by this By-law will result from any filling, dredging, building upon or other alteration within a wetland resource area or within fifty (50) feet of the edge of any freshwater wetland, marsh, wet meadow, bog, or swamp within fifty (50) feet of the top of the bank of any lake, reservoir, pond or intermittent stream, brook or creek or within one-hundred (100) feet of any vernal pool or the top of the bank of any river or any perennial stream, brook or creek unless the applicant demonstrates by clear and convincing evidence that such significant adverse effect will not occur.
- Art. XVIII Wetlands Protection, Sec. 4.A, General By-laws (amended through March 29, 2025 ATM), p. 46
No such activities shall commence without receiving and complying with an Order of Conditions issued pursuant to this By-law.
- Conservation Commission Regulations Sec. 7.1, Conservation Commission Buffer Zone Regulations (Section 7 Permits and Conditions), p. 2
In other words, the Commission will not permit permanent structures within 100 feet of a Wetland Resource Area or within 200 feet of a river or perennial stream in the case of new lots created after March 29, 2003.
- Conservation Commission Regulations Sec. 7.2, Conservation Commission Buffer Zone Regulations (Section 7 Permits and Conditions), p. 2
This naturally vegetated buffer strip will be a minimum of 50 feet in width (100 feet in the case of rivers and perennial streams).
- Conservation Commission Regulations Sec. 7.2, Conservation Commission Buffer Zone Regulations (Section 7 Permits and Conditions), p. 3
If the total amount of new impervious and semi-pervious surface area created by a project within the Upland Buffer Zone Resource Area is greater than 400 square feet or is closer than 70 feet from the Wetland Resource Area (or 120 feet in the case of rivers or perennial streams), the Commission will require the applicant to provide clear and convincing evidence that the project will not have significant adverse impact on any adjoining Wetland Resource Area.
- Sec. 12.2.5 Bodies of Water, Zoning By-laws (latest amendment September 22, 2025), p. 36
12.2.5 Bodies of Water. All standing or flowing bodies of water are included within the W-Wetland and Watershed Protection District, including, but not limited to, streams and other water courses, ponds and bogs.
- Sec. 4.3 Non-Conforming Uses, Zoning By-laws (latest amendment September 22, 2025), p. 17
4.3 A single or two-family residential structure m a y be the subject of alteration, reconstruction, extension or structural change provided that such alteration, reconstruction, extension or structural change does not increase the non- conforming nature of such structure.
- Art. XVIII Wetlands Protection, Sec. 9.A(8), General By-laws (amended through March 29, 2025 ATM), p. 50
8) Destruction of plant life including cutting or trimming of trees and shrubs;