Maryland Code, Land Use § 7-502

(1) consists of new construction or substantial renovation, as annually established and identified by the Department of Housing and Community Development in the Multifamily Rental Financing Program Guide;

(2) is on property that:

(3) contains at least 25% of units that are affordable dwelling units; and

(4) is deed-restricted to include 25% of units that are affordable dwelling units for a period of at least 40 years.

(b)(1) In accordance with this subsection, a local jurisdiction shall allow the density of a qualified project to exceed the density otherwise authorized in a district or zone.

(2) In an area zoned for single-family residential use, a qualified project may include middle housing units.

(3) In an area zoned for multifamily residential use, a qualified project:

(4) Subject to § 7-509 of this subtitle, a qualified project may consist of mixed-use development with density limits that do not exceed the highest allowable density in the local jurisdiction's multifamily residential zones:

(5) In an area zoned for mixed-use, a qualified project may consist of residential development with density limits that do not exceed the greater of the following:

(6) If a qualified project is allowed to exceed the density otherwise authorized by a local jurisdiction in a district or zone under this section, the qualified project may not also exceed the authorized density under § 7-503 or § 7-504 of this subtitle.