MA H1493

Defines "movable tiny house" as a transportable dwelling on a frame or chassis with no more than 400 square feet (excluding lofts, porches, and storage), permitted on lots where single-family homes or accessory dwelling units are allowed

Requires MassDOT, RMV, and Secretary of the Commonwealth to create a new registration category for movable tiny houses, with a $100 certificate of title fee

Allows occupancy for up to 180 days before inspection; after 180 days, requires established address, energy, water, and wastewater systems, plus inspection for certificate of occupancy

Reduces insulation requirements below standard building code, capping at R13 for walls, R19 for floors, and R25 for ceilings

Prohibits municipalities from establishing design criteria that effectively exclude movable tiny houses, though cities and towns may adopt less restrictive rules or offer tax incentives for hosted parking