Md. Code, Housing and Community Development § 4–611

Subject to the approval and permitting procedures of the local zoning authority, a group home that houses four or more individuals may provide for nonresidential uses that:

(1) are in a minor part of the building;

(2) conform with local zoning requirements; and

(3) although not directly related to the housing facility, offer goods or services for persons of lower income or other disadvantaged individuals.