Md. Code, Transportation § 5–821

(a) Unless a person has an appropriate permit issued by the Administration, the person may not, in a noise zone established under this part:

(1) Establish or construct any new structure;

(2) Make any new use of any existing structure or land; or

(3) Substantially alter any existing structure or use of land.

(b) Notwithstanding subsection (a) of this section, the Administration may not require any person to obtain a permit to construct an addition to a residential structure in a noise zone established under this part, if:

(1) The resultant improved structure retains the same number of family dwelling units; and

(2) The addition is not made eligible for participation in any State funded noise assistance program established under Subtitle 12 of this title.

(c) The Administration may not grant a permit if the proposed action would:

(1) Enlarge the size of or create an impacted land use area; or

(2) Violate local land use and zoning laws.

(d) Unless a person has an appropriate permit issued by the Administration or a variance granted by the Board of Airport Zoning Appeals, a political subdivision may not approve a final subdivision plan or issue any permit that is prerequisite to the construction of improvements in a noise zone established under this subtitle.