Residential Rental Apartments - Air-Conditioning Requirement

HB 153 requires landlords to provide air-conditioning in most residential rental units in Maryland under specific conditions. It applies to buildings with four or more dwelling units (excluding historic properties, pre-1950 developments, and certain Baltimore public housing), mandating landlords maintain temperatures at or below 80°F in living areas from June 1 to September 30 each year. New construction must comply starting June 1, 2026, while units with major electrical or heating system upgrades must comply starting October 1, 2026. The law does not apply retroactively to buildings with permits issued before the bill's effective date.