Building near the water in Andover, Massachusetts (wetlands rules)
Work within 100 feet of a wetland, pond or stream, or within 200 feet of a river, needs a permit from the Andover Conservation Commission under the town's Wetlands Protection Bylaw. New buildings that need a building permit must generally stay 50 feet from the resource area. No vegetation may be removed within 25 feet.
| Conservation Commission jurisdiction | Resource areas plus 100 ft around them; 200 ft from rivers [1] |
| No-disturb vegetated buffer | 25 ft (50 ft in Watershed Protection Overlay; 100 ft from vernal pools) [4] |
| Building setback (needs building permit) | 50 ft (75 ft in Watershed Protection Overlay; 100 ft from vernal pools) [5] |
| Setback for permit-exempt structures | 25 ft (50 ft / 100 ft) [6] |
| Pre-1999 homes | Ordinary improvements exempt from the bylaw permit, except freestanding structures over 500 sq ft [2] |
| Request for Determination of Applicability fee | $250 [7] |
| Watershed Protection Overlay | No new building, structure or land disturbance within 50 ft of water bodies [8] |
| Expanding a nonconforming home (zoning) | Allowed if the Building Inspector finds it doesn't increase the nonconformity; otherwise ZBA special permit [9] |
Wetlands rules here come from the town's Wetlands Protection Bylaw (eCode printout dated Aug 2021) and Conservation Commission regulations revised through July 2026; the zoning overlay rules come from the 2022 recodified Zoning Bylaw and may have changed since.
Where the rules apply
Andover has no shoreland zoning, but its Wetlands Protection Bylaw goes further than the state Wetlands Protection Act. Without Conservation Commission approval, you may not fill, dredge, build on or alter any bank, wetland, pond, lake, stream, river or vernal pool, land within 100 feet of one, land subject to flooding, or land within 200 feet of a river [1]. The state's exemptions don't apply under the local bylaw except as the bylaw itself provides.
Older homes
Ordinary improvements to a single- or two-family house that existed or had a building permit by January 1, 1999 don't need a bylaw permit. That includes additions and converting lawn to decks, sheds, patios or pools. A new freestanding structure with a footprint over 500 sq ft still needs one [2]. State Wetlands Protection Act filings may still apply.
Buffers and setbacks
Within 200 feet of rivers, you must show there's no practicable alternative with less impact [3]. The Commission's regulations add these limits:
- No removal of vegetation, excavation or filling within 25 feet of a bank, wetland, pond or stream (50 feet in the Watershed Protection Overlay District, 100 feet from a vernal pool). Removing trees there needs Commission approval [4].
- Buildings needing a building permit: 50 feet from the resource area (75 feet in the overlay district, 100 feet from a vernal pool) [5].
- Permit-exempt structures such as small sheds: 25, 50 or 100 feet [6].
Filing
File a Request for Determination of Applicability ($250) if you're not sure the bylaw applies [7], or a Notice of Intent for work that does. Hearings are public, abutters get notice, and the permit must be recorded at the Registry of Deeds before work starts.
Zoning overlays
In the Fish Brook/Haggett's Pond Watershed Protection Overlay District, zoning bars new buildings, structures, land disturbance or fill within 50 feet of water bodies and watercourses, with narrow exceptions for public water-supply work and paths [8]. The Flood Hazard Overlay adds floodplain rules. Under zoning, a nonconforming single-family home can be expanded if the Building Inspector finds the change doesn't increase the nonconformity [9]; otherwise the Zoning Board of Appeals may grant a special permit.
Next steps
- Check whether your work is within 100 feet of a wetland, pond or stream (200 feet of a river); the Conservation Department can help locate resource areas.
- Ask for a pre-application meeting with the Conservation Agent, which the Commission recommends.
- File a Request for Determination of Applicability ($250) or a Notice of Intent with the Conservation Commission, notify abutters, and attend the public hearing.
- Record the Commission's permit at the Essex North Registry of Deeds before starting, then get your building permit.
Common questions
- Do I need a permit to build near a wetland or pond in Andover, Massachusetts?
- Yes. Work within 100 feet of a wetland, pond or stream, or within 200 feet of a river, needs a permit from the Andover Conservation Commission under the Wetlands Protection Bylaw.
- How far must a new building be from wetlands in Andover, Massachusetts?
- New buildings that need a building permit must generally stay 50 feet from the resource area (75 feet in the Watershed Protection Overlay, 100 feet from a vernal pool). No vegetation may be removed within 25 feet.
- Are older homes exempt from Andover, Massachusetts wetlands rules?
- Partly. Ordinary improvements to a house that existed or had a building permit by January 1, 1999 don't need a bylaw permit, but a new freestanding structure over 500 sq ft still does. State filings may still apply.
- What does a wetlands filing cost in Andover, Massachusetts?
- A Request for Determination of Applicability costs $250. Use it if you're not sure the bylaw applies; work that does apply needs a Notice of Intent.
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. XIV, § 2 Jurisdiction, Article XIV Wetlands Protection By-Law (eCode printout, Aug 2021), p. 1
Except as permitted by the Conservation Commission or as provided in § 3 of this by-law, no person shall remove, fill, dredge, build upon, degrade or otherwise alter the following resource areas: any bank, freshwater wetland, marsh, wet meadow, bog, swamp, vernal pool, reservoir, lake, pond, creek, river or stream, or any land under said waters, or any land within 100 feet of any of the aforesaid resource areas, or any land subject to flooding or inundation by groundwater or surface water, or within 200 feet of any river (collectively, the "resource areas protected by this by-law").
- Art. XIV, § 3 Exceptions, Article XIV Wetlands Protection By-Law (eCode printout, Aug 2021), p. 1
The application and permit required by this by-law shall not be required for work which is performed in connection with the ordinary maintenance or improvement of a single- or two-family house lawfully in existence or for which a building permit had been issued on or before January 1, 1999, including, but not limited to, building additions, septic system replacements and sewer connections, and the conversion of lawn to accessory uses such as decks, sheds, patios and pools; except the application and permit required by this by-law shall apply to the construction of freestanding structures which have a footprint greater than 500 square feet.
- Art. XIV, § 8 Permits and conditions, Article XIV Wetlands Protection By-Law (eCode printout, Aug 2021), p. 3
In reviewing proposed activity in areas within 200 feet of rivers, no permit issued hereunder shall permit any activities unless the applicant, in addition to meeting the otherwise applicable requirements of this by-law, has proved by a preponderance of the evidence that there is no practicable alternative to the proposed project with less adverse effects and that such activities, taking into account proposed mitigation measures, will have no significant impact on the values protected by this by-law.
- Sec. 4(2) Vegetative Buffer Zone, Conservation Commission Wetland Protection Regulations (revised through July 8, 2026), p. 3
There shall be no removal of vegetation, excavation or filling within 25 feet of any bank, bordering vegetated wetland, isolated vegetated wetland, marsh, wet meadow, bog, swamp, reservoir, pond, creek, river or stream, or any land under said waters, or within 50 feet of resource areas located within Town of Andover Watershed Protection Overlay District; or within 100 feet of any vernal pool, except as otherwise permitted with by these regulations.
- Sec. 4(3) Building/Structure Setbacks, table item 1, Conservation Commission Wetland Protection Regulations (revised through July 8, 2026), p. 5
1. Buildings/Structures that require a building permit except as 50 75 100 listed below.
- Sec. 4(3) Building/Structure Setbacks, table item 2, Conservation Commission Wetland Protection Regulations (revised through July 8, 2026), p. 5
2. Structures that are exempt from building permits except as listed below.(The distances are the same as those required for 25 50 100 Buffer Strips)
- Sec. 6(6)(a) Fees, Administrative Fees, Conservation Commission Wetland Protection Regulations (revised through July 8, 2026), p. 16
Request for Determination of Applicability $250.00
- Sec. 8.8.6(5) Watershed Protection Overlay District, Prohibited Uses, Re-Codified Andover Zoning Bylaw (March 21, 2022 text, adopted as new Article VIII at 2023 ATM) - town PDF, p. 106
Any new building, structure, land-disturbing activities, excavation, or fill within 50 feet of all water bodies and watercourses as defined in this Bylaw;
- Sec. 3.3.5 Nonconforming Single- and Two-Family Residential Structures, Re-Codified Andover Zoning Bylaw (March 21, 2022 text, adopted as new Article VIII at 2023 ATM) - town PDF, p. 9
Nonconforming single- and two-family residential structures may be reconstructed, extended, altered, or structurally changed upon a determination by the Inspector of Buildings that the proposed reconstruction, extension, alteration, or change does not increase the nonconforming nature of the structure.