Tiny Homes in Worcester, Massachusetts

Worcester follows the statewide Affordable Homes Act (Chapter 150, Acts of 2024) and allows ADUs by-right on all single-family lots as of February 2, 2025. Detached, attached, and internal ADUs are all permitted up to 900 sq ft or 50% of the primary dwelling, whichever is less, with a 350 sq ft minimum per state health code. ADUs cannot be placed in the front yard, and only one ADU is permitted per property. A building permit, plumbing permit, electrical permit, and Certificate of Occupancy are required from the Worcester Department of Inspectional Services. Worcester does not impose owner-occupancy requirements and follows statewide parking rules (one off-street space per ADU, waived within 0.5 miles of transit). Tiny homes of 400 sq ft or less on permanent foundations can use the Appendix AQ code pathway from the 10th Edition of 780 CMR. THOWs are classified as recreational vehicles and cannot serve as primary residences on standard residential lots. Verify current requirements with your local planning department before purchasing land or beginning construction.