Md. Code, Health - General § 8–406

(a) A small halfway house:

(1) Is deemed conclusively a single–family dwelling for purposes of zoning; and

(2) Is permitted to locate in all residential zones.

(b) A large halfway house is deemed conclusively a multifamily dwelling and is permitted to locate in zones of similar density.

(c) A halfway house is not subject to any special exception, conditional use permit, or procedure that differs from that required for a single–family dwelling or a multifamily dwelling of similar density in the same zone.

(d) A general zoning ordinance that conflicts with the provisions of this section is superseded by this section, to the extent of the conflict.