Accessory Structures in Worcester, MA (2026)
8 verified accessory structures rules for Worcester, Massachusetts, sourced directly from the municipal code and official government pages.
Verified from official government sources
ADU Rules
Worcester allows ADUs on properties with existing single-, two-, or three-family dwellings as of January 2024. ADUs are limited to 900 square feet. Massachusetts law now allows ADUs by right statewide.
Worcester Accessory Dwelling Unit (ADU) Rules
Some RestrictionsMass. Gen. Laws ch. 40A, § 3 – Subjects which zoning may not regulate
accessory dwelling unit, or the rental thereof, in a single-family residential zoning district; provided, that the use of land or structures for such accessory dwelling unit under this paragraph may be subject to reasonable regulations, including, but not limited to, 310 CMR 15.000 et seq., if applicable, site plan review, regulations concerning dimensional setbacks and the bulk and height of s...
ADU Permits
Worcester ADU permits are issued by the Department of Inspectional Services under the Worcester Zoning Ordinance (Chapter 9 of the Revised Ordinances) and the statewide ADU-by-right standards established by the 2024 Massachusetts Affordable Homes Act (Chapter 150 of the Acts of 2024). Detached and internal ADUs up to 900 sq ft are allowed by-right in single-family zones, with building, electrical, plumbing, and gas permits required.
Worcester ADU Permit Requirements
Some RestrictionsADU Impact Fees
Worcester does not impose dedicated ADU impact fees. The 2024 Massachusetts Affordable Homes Act prohibits municipalities from charging fees that would render ADU construction infeasible. Standard Department of Inspectional Services permit fees apply (building, plumbing, electrical, gas), and Worcester's inclusionary policies do not apply to single-ADU residential additions.
Worcester ADU Impact Fees
Few RestrictionsADU Owner Occupancy
The 2024 Massachusetts Affordable Homes Act expressly prohibits cities including Worcester from requiring owner occupancy as a condition of constructing or renting an ADU. Owner-occupancy mandates are no longer enforceable for by-right ADUs of 900 sq ft or less on single-family lots, regardless of any prior local rule.
Worcester ADU Owner-Occupancy Rules
Few RestrictionsADU Rental Restrictions
Worcester ADUs can be rented as long-term residential units (30+ days) without owner-occupancy under the 2024 Massachusetts Affordable Homes Act. Worcester does not currently have a comprehensive short-term rental ordinance, but state law (G.L. c. 64G) requires STR operators to register with the Massachusetts Department of Revenue and collect the state room occupancy excise tax plus the Worcester local option tax.
Worcester ADU Rental and Short-Term Restrictions
Some RestrictionsShed Rules
Worcester requires building permits for most accessory structures. Sheds must comply with zoning setbacks and lot coverage limits. Small structures under a certain size may be exempt from building permits.
Worcester Shed & Accessory Structure Rules
Some RestrictionsGarage Conversions
Garage conversions to living space in Worcester require building permits and full residential code compliance. Off-street parking requirements must still be met after conversion.
Worcester Garage Conversion Rules
Some RestrictionsMass. Gen. Laws ch. 40A, § 3A – MBTA communities multi-family zoning
An MBTA community shall have a zoning ordinance or by-law that provides for at least 1 district of reasonable size in which multi-family housing is permitted as of right; provided, however, that such multi-family housing shall be without age restrictions and shall be suitable for families with children. For the purposes of this section, a district of reasonable size shall: (i) have a minimum gr...
Carport Rules
Carports in Worcester are regulated as accessory structures under the Worcester Zoning Ordinance (Article IV) and the Massachusetts State Building Code 780 CMR. A building permit is required for any carport unless it qualifies for the 200 sq ft detached accessory structure exemption in 780 CMR 51 R105.2. Carports must comply with the underlying zoning district's setback and yard requirements.
accessory-structures/carport-rules
Some RestrictionsWorcester Zoning Ordinance, Article I § 2 (Definitions) and Article IV § 8(B)(4),(10) – Accessory Uses, Limitation in Residential Districts
CARPORT – An attached roof projecting from the side of a building, used as a shelter for an automobile. ... Unless provided herein, no accessory building or structure separate from the main building, including a private swimming pool may exceed fifteen (15) feet in height, nor be located closer to any lot line than five (5) feet. No accessory building or use may occupy any part of a required fr...
Looking for Worcester County county-wide rules?
County ordinances apply to unincorporated areas and may supplement Worcester city rules.
Accessory Structures in Worcester County →