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Massachusetts Statewide Rule

Massachusetts Agricultural Zoning Protections Under Chapter 40A

Few RestrictionsApplies statewide across Massachusetts (2026)

Key Facts

Statute
MGL Chapter 40A Section 3 limits zoning
Large Farm
Five-acre threshold full protection
Small Farm
Two-acre with $1,000/acre sales
Structure Regulation
Reasonable rules allowed
Tax Benefits
Chapter 61A benefits available
Last verified: September 5, 2026Source: Massachusetts General Court

Summary

Massachusetts protects agricultural land use through MGL Chapter 40A Section 3, exempting agriculture, horticulture, and floriculture from most local zoning restrictions on parcels of five acres or more.

No zoning ordinance or by-law shall regulate or restrict the use of materials, or methods of construction of structures regulated by the state building code, nor shall any such ordinance or by-law prohibit, unreasonably regulate, or require a special permit for the use of land for the primary purpose of commercial agriculture, aquaculture, silviculture, horticulture, floriculture or viticulture, nor prohibit, unreasonably regulate or require a special permit for the use, expansion, reconstruction or construction of structures thereon for the primary purpose of commercial agriculture, aquaculture, silviculture, horticulture, floriculture or viticulture, including those facilities for the sale of produce, wine and dairy products

Source: Massachusetts General CourtView official code

Full Breakdown

MGL Chapter 40A Section 3 limits municipal zoning authority over agricultural activities. The provision states no zoning ordinance or bylaw shall regulate or restrict agricultural use of land for primary purpose of commercial agriculture, aquaculture, silviculture, horticulture, floriculture, or viticulture on parcels of more than five acres, or two acres if generating gross sales exceeding $1,000 per acre. Cities may still apply reasonable zoning to farm structures and signs but cannot prohibit agricultural use itself. The Chapter 61A current-use tax program provides additional incentives for keeping land in active agricultural use.

Violations & Penalties

Local zoning ordinances purporting to ban protected agriculture on qualifying parcels are unenforceable and may be voided in court with potential attorney fee awards.

Frequently Asked Questions

Can my town zone away my Massachusetts farm?
Generally no. MGL Chapter 40A Section 3 protects qualifying agricultural parcels from zoning prohibitions on farming activity itself.
What size parcel qualifies for agricultural zoning protection?
Parcels of five acres or more qualify automatically, while smaller parcels of two acres or more qualify with sales exceeding $1,000 per acre.

Sources

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