Housing (Building Codes)

This bill allows movable tiny houses (under 400 sq ft) to be used as permanent primary residences or accessory units on single-family lots in Massachusetts. It creates a new state registration category with a $100 title fee, requires adherence to specific chassis and size standards, and mandates an on-site inspection after 180 days of occupancy to ensure basic utilities and safety. Local cities and towns must permit these units but cannot impose exclusionary design rules, though they may offer tax incentives for hosting them. The policy directly affects homeowners seeking affordable housing options, property owners on single-family lots, and municipal governments responsible for zoning enforcement.