Town Permit Guide

Home › Massachusetts › Westford › Building Near the Water (Wetlands Rules)

Building near the water in Westford, Massachusetts (wetlands rules)

Westford, Middlesex County · Bylaws checked 2026-10-19 · Reviewed · 12 cited sections

Allowed with board review

Any work within 100 feet of a pond, lake, stream or wetland in Westford needs Conservation Commission approval under the town wetlands bylaw, and the Commission also reviews work within 200 feet of a perennial stream. Its regulations set minimum setbacks from the wetland edge: on a lot with a house, work on lawn, landscaped or paved areas stays 30 feet back and buildings 55 feet; in natural areas of a developed lot or on an undeveloped lot it's 50 feet for work and 75 feet for buildings.

Bylaw jurisdictionWithin 100 ft of any bank, wetland, pond, lake, stream or the FEMA 100-year flood line [1]
Riverfront Area200 ft from perennial streams [7]
Developed lot, work on lawn/landscaped (artificial) area30 ft limit of work / 55 ft limit of building [3]
Developed lot, work in natural area50 ft limit of work / 75 ft limit of building [4]
Undeveloped lot50 ft limit of work / 75 ft limit of building [5]
Septic systemsNot allowed in wetlands or the 100-ft buffer zone (limited replacement exceptions) [2]
Yard waste disposal (no review needed for basic yard care)At least 50 ft from wetlands [8]

What the bylaw covers

Westford's Wetlands Bylaw (General Bylaws Ch. 171) bars removing, filling, dredging, altering or building within 100 feet of any bank, wetland, vernal pool, beach, brook, stream, pond or lake, or the FEMA 100-year flood line, without Conservation Commission permission [1]. A "lake" here is 10 acres or more [10]. No work may start until you have a permit [11]. The Commission also reviews work within 200 feet of perennial streams (the Riverfront Area) [7]. Septic systems are prohibited in wetlands and the 100-foot buffer, with limited exceptions for replacing systems serving pre-1994 structures [2].

Setbacks from the wetland edge

The Commission's Chapter 235 regulations (updated December 2020) set minimum distances from the edge of wetlands and other resource areas [3][4][5]:

  • Lot with an existing house, work on an artificial surface (lawn, formal landscaping, paving, gravel drives, structures): 30 ft limit of work, 55 ft limit of building.
  • Lot with an existing house, work in a natural area: 50 ft work, 75 ft building.
  • Undeveloped lot: 50 ft work, 75 ft building.

"Work" includes clearing vegetation, grading, stockpiling, and placing swing sets, trampolines or fences; "building" includes anything needing a building permit and any shed [6]. Docks, piers and retaining walls that need direct water access may be allowed inside the setbacks. Gardens, fields and cleared or thinned woods do not count as "artificial surface", so the 50/75-foot distances apply there.

Existing homes and clearing

New work or structures can't go any closer to the wetland than existing nonconforming ones [9]. Mowing, raking and routine gardening in an existing yard need no review, provided clippings go at least 50 feet from wetlands [8]; removing up to two dead or dangerous trees can be approved by staff. Clearing or cutting beyond that counts as work inside the setbacks.

Floodplain

In the zoning Floodplain Overlay District, all development needs a permit from the Building Commissioner as floodplain administrator [12].

See how Westford compares with 8+ other Massachusetts towns on building near the water (wetlands rules) →

Next steps

  1. Check Westford GIS or MassMapper to see whether your project is within 100 ft of a wetland or water body, 200 ft of a perennial stream, or in the floodplain.
  2. Contact the Conservation Resource Planner early; for small or uncertain projects file a Request for Determination of Applicability (WPA Form 1).
  3. For larger work, file a Notice of Intent (WPA Form 3) with plans showing the wetland line, setback distances and limit of work, plus abutter notice; attend the public hearing.
  4. Get the Order of Conditions or permit before applying for your building permit, and request a Certificate of Compliance when done.

Common questions

Do I need Conservation Commission approval to build near a pond in Westford, Massachusetts?
Yes. Any work within 100 feet of a pond, lake, stream or wetland in Westford needs Conservation Commission approval under the town wetlands bylaw, and the Commission also reviews work within 200 feet of a perennial stream. No work may start until you have a permit.
How close to a wetland can I build in Westford, MA?
It depends on the area. On a lot with a house, work on lawn, landscaped or paved areas must stay 30 feet from the wetland edge and buildings 55 feet. In natural areas of a developed lot, or on an undeveloped lot, it's 50 feet for work and 75 feet for buildings.
Can I put a septic system near a wetland in Westford, Massachusetts?
Generally no. Westford's wetlands bylaw prohibits septic systems in wetlands and the 100-foot buffer zone, with limited exceptions for replacing systems serving pre-1994 structures.
Can I mow my lawn near a wetland in Westford, MA?
Yes. Mowing, raking and routine gardening in an existing yard need no Conservation Commission review, as long as clippings go at least 50 feet from wetlands. Clearing or cutting beyond that counts as work inside the wetland setbacks.

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.

State sources: M.G.L. c. 131, §40 (Wetlands Protection Act) · 310 CMR 10.00, Wetlands Protection Act Regulations · MassDEP, Protecting Wetlands in Massachusetts

What the bylaw says

Exact text from Westford's published bylaws. Section numbers are as printed in the source.

  1. Ch. 171, §171.2(A) Prohibited activities, Wetland Protection Bylaw - General Bylaws Chapter 171: Wetlands (Conservation Commission copy, 2019 compilation), p. 1
    Except as permitted by the Conservation Commission or as provided by this bylaw, no person shall remove, fill, dredge, alter, or build upon or within 100 feet of any bank, fresh water wetland, flat, marsh, wet meadow, bog, swamp, vernal pool, or beach; upon or within 100 feet of any brook, stream, pond or lake, or upon or within 100 feet of any land under said waters or within 100 feet of the 100-year flood line as determined under the Federal Emergency Management Agency (FEMA).
  2. Ch. 171, §171.2(B)(1) Use prohibitions, Wetland Protection Bylaw - General Bylaws Chapter 171: Wetlands (Conservation Commission copy, 2019 compilation), p. 1
    (1) Except as provided below, no septic system or other sewage disposal system, or any component of any septic system or sewage disposal system, shall be installed in wetlands or within the buffer zone to any wetlands
  3. Ch. 235, §235-2(E)(9) Minimum Set-Backs table, Conservation Commission - Chapter 235 Wetlands Rules and Regulations (updated to 12-9-2020), p. 9
    Work on a lot with an existing structure where work is 30 55 proposed on an artificial surface area of the lot.
  4. Ch. 235, §235-2(E)(9) Minimum Set-Backs table, Conservation Commission - Chapter 235 Wetlands Rules and Regulations (updated to 12-9-2020), p. 9
    Work on a lot with an existing structure where work is 50 75 proposed within an existing non-artificial surface area.
  5. Ch. 235, §235-2(E)(9) Minimum Set-Backs table, Conservation Commission - Chapter 235 Wetlands Rules and Regulations (updated to 12-9-2020), p. 9
    Work on an undeveloped lot 50 75
  6. Ch. 235, §235-2(E)(9) Minimum Set-Backs, Conservation Commission - Chapter 235 Wetlands Rules and Regulations (updated to 12-9-2020), p. 9
    For the purposes of the table above, “work” means cutting or removal of vegetation, filling, excavation, grading, operation of motorized construction equipment, storage or stockpiling of earth or construction materials or debris or brush or other wood or yard waste or placement of vehicles, recreational equipment such as swing sets or trampolines or fences, and “building” means any structure requiring a building permit, as well as a shed or other storage structure of any size.
  7. Ch. 235, §235-3 Definitions, Riverfront Area, Conservation Commission - Chapter 235 Wetlands Rules and Regulations (updated to 12-9-2020), p. 16
    Riverfront Area – a 200-foot resource area associated with perennial streams that extends horizontally from the mean annual highwater or top of bank whichever is greater.
  8. Ch. 235, §235-2(E)(8) No Review Required, Conservation Commission - Chapter 235 Wetlands Rules and Regulations (updated to 12-9-2020), p. 8
    Basic yard maintenance is considered to be raking, mowing, and non-chemical yard grooming, with all clippings, cuttings, or grooming materials properly disposed of outside of the wetlands, related water resources and at a minimum of 50-feet from wetlands and related water resources.
  9. Ch. 235, §235-2(E)(9) Minimum Set-Backs, Conservation Commission - Chapter 235 Wetlands Rules and Regulations (updated to 12-9-2020), p. 10
    No new activity shall commence, and no new structure shall be located closer to the edge of wetlands or related water resources than existing non-conforming like activities or structures.
  10. Ch. 171, Definitions, Lake, Wetland Protection Bylaw - General Bylaws Chapter 171: Wetlands (Conservation Commission copy, 2019 compilation), p. 7
    Lake shall be defined as a body of water with a surface area of 10 or more acres, either artificial or natural.
  11. Ch. 171, §171.4(A) Applications for permits, Wetland Protection Bylaw - General Bylaws Chapter 171: Wetlands (Conservation Commission copy, 2019 compilation), p. 3
    No activities shall commence without receiving and complying with a permit issued pursuant to this bylaw.
  12. Sec. 8.2.3 Floodplain Administrator, 2025 Zoning Bylaw (amended through Special Town Meeting October 27, 2025; certified copy), p. 96
    The Town of Westford hereby designates the position of Building Commissioner to be the official floodplain administrator for the Town.
This page summarizes Westford's posted bylaws as of 2026-10-19. Bylaws are amended, and individual lots can have overlays, subdivision covenants, or HOA rules that are stricter. Confirm with Building Department (Building Commissioner & Zoning Enforcement Officer Erik Tardif), Town Hall, 55 Main Street, Westford MA 01886 (978-692-5527) before you build. Spot an error?