Building size and unit history matter
Maryland's current October 1 housing-law notice explains new air-conditioning requirements for specified apartment units. The enacted law applies to buildings with ten or more individual dwellings, with exclusions including listed historic properties and specified Baltimore public-housing categories.
The triggers include newly constructed units and units where air conditioning was provided or required by a lease after the stated 2025 date. October 1 also triggers requirements for covered renovations involving replacement or substantial upgrades of electrical or heating systems. The rule does not simply cover every unit regardless of its history.
The cooling standard applies in summer
From June 1 through September 30, covered cooling must maintain, or be capable of maintaining when tenant-controlled, no more than 80 degrees Fahrenheit at the specified measuring height in habitable spaces. Reasonable maintenance and repair conditions are addressed in the text.
Preserve the lease, building details and maintenance request when asking whether a unit is covered. The October effective framework sets obligations for certain properties and renovation paths, not a universal immediate installation promise or a fixed compensation award. The seasonal standard also differs from requiring a particular temperature throughout winter.