Accessory Structures in Lynn, MA (2026)
3 verified accessory structures rules for Lynn, Massachusetts, sourced directly from the municipal code and official government pages.
Verified from official government sources
ADU Rules
Lynn allows one accessory dwelling unit by right on single-family lots, adopted February 11, 2025 under the state Affordable Homes Act. An ADU may not exceed 900 square feet or 50% of the main home's floor area.
Lynn ADU (Accessory Dwelling Unit) Rules
Some RestrictionsCity of Lynn Zoning Ordinance (adopted 2025-07-07), Section 9.B.2.a
By right. Subject to the requirements of this Ordinance, one accessory dwelling unit is allowed as of right on property located in a single-family residential zoning district, either within a principal dwelling or in a structure accessory thereto.
Shed & Carport Rules
Lynn's 2025 Zoning Ordinance caps accessory structures like sheds and garages at 15 feet in height for one- and two-family lots, keeps them out of front and side setbacks, and limits total accessory floor area to 25% of the principal building's floor or lot area under Section 4.5.
Lynn Accessory Building and Shed Rules
Some RestrictionsLynn Zoning Ordinance § 4.5.a-c
5. Dimensional requirements for accessory structures. a. Area. The total area of uses accessory to the principal use is limited to 25 percent of the floor area or lot area of the Principal Use(s) to which it is accessory, and the total area of uses or buildings accessory to the principal use except that parking facilities and driveways may not occupy an area equal to or greater than 15 percent ...
Tiny Homes
Lynn bans tiny homes on wheels as dwellings. ADUs may not occupy RVs, campers, or structures on wheels. A tiny home on a permanent foundation must meet the MA Building Code and accessory-structure zoning limits.
Lynn Tiny Home & Small Dwelling Rules
Some RestrictionsCity of Lynn Zoning Ordinance (adopted 2025-07-07), Section 9.B.3.a
ADUs may not be located in temporary structures, mobile structures, campers, recreational vehicles (RVs), and other structures on wheels.