Maryland Code, Tax-Property § 8-104

(1) the land; and

(2) the improvements on the land.

(b)(1) Notwithstanding a revaluation under subsection (c) of this section, the Department or supervisor shall value all real property once in every 3-year cycle based on a review of the real property under § 2-203 of this article.

(2) The date of finality for real property that is valued under this subsection is the January 1 immediately before the 1st taxable year to which the assessment based on the new value is applicable.

(c)(1) In any year of a 3-year cycle, real property shall be revalued if any of the factors listed below causes a change in the value of the real property:

(2) When real property is revalued under this subsection, the Department or supervisor shall:

(3) The Department or supervisor shall revalue real property under paragraph (1)(i), (ii), (iv), (v), and (vi) of this subsection on the semiannual date of finality. The revaluation shall be effective for the taxable year beginning on the semiannual date of finality, if the notice under this title is sent no later than 30 days after the semiannual date of finality.

(4) The Department or supervisor shall revalue real property under paragraph (1)(iii) of this subsection on the date of finality, semiannual date of finality, or quarterly date of finality following the substantial completion of the improvements to land.

(d)(1) The local agency responsible for zoning shall provide the supervisor of assessments a list of each zoning classification change within 30 days of the approval of the change.

(2) The list shall identify any zoning classification change initiated or requested by the owner of the property or anyone having an interest in the property.