Md. Code, Land Use § 20–504

(a) A permit to construct a building or structure in a subdivision may not be issued unless the road giving access to the lot where the building or structure is proposed to be located:

(1) has the legal status of a public road or was dedicated to public use;

(2) corresponds in its exact location with a road shown on a subdivision plat approved by the Commission or with a master plan of transportation or plat adopted by the Commission; or

(3) is on a private right–of–way or easement approved as adequate by the county council in accordance with subsection (b) of this section.

(b) By local law, the county council may:

(1) adopt standards to assure that a private right–of–way or easement is adequate to provide access to a lot where a building is proposed to be located; and

(2) delegate to the executive branch or county planning board the authority to approve a private right–of–way or easement that is adequate under item (1) of this subsection.