Maryland Code, Land Use § 7-501

(a) In this subtitle the following words have the meanings indicated.

(b) “Affordable” means that housing costs do not exceed 30% of a household's income.

(c) “Affordable dwelling unit” means a dwelling unit that is affordable to households earning 60% or less of the area median income.

(d) “Area median income” means the median household income for the area adjusted for household size as published and annually updated by the U.S. Department of Housing and Urban Development.

(e) “Board of appeals” means a board of appeals established under Title 4, Subtitle 3 of this article.

(f) “Cottage cluster” means a grouping of not fewer than four detached housing units per acre that:

(g) “Historic district commission” or “historic preservation commission” means a commission established under Title 8, Subtitle 2 of this article.

(h) “Middle housing” means:

(j) “Permit” means a building permit or other permit issued in writing, as required by a local jurisdiction, to authorize the start of predevelopment or construction activities to construct, alter, demolish, or relocate an existing or new structure.

(k) “Planning commission” includes a planning commission or board established under:

(l) “Town house” means a complex of dwelling units constructed in a row of three or more attached units, where each dwelling unit is located on an individual lot or parcel and shares at least one common wall with an adjacent dwelling unit.

(m) “Unreasonable limitation or requirement” includes any limitation or requirement that amounts to a de facto denial by having a substantial adverse impact on: