(a) $1 per square foot on structures or portions of structures intended for residential use, including but not limited to single-unit or multiple-unit housing; and
(b) $0.50 per square foot on structures or portions of structures intended for nonresidential use, not including multiple-unit housing of any kind.
(2) In addition to the limitations under subsection (1) of this section, a construction tax imposed on structures intended for nonresidential use may not exceed $25,000 per building permit or $25,000 per structure, whichever is less.
(3)(a) For years beginning on or after June 30, 2009, the limitations under subsections (1) and (2) of this section shall be adjusted for changes in construction costs by multiplying the limitations set forth in subsections (1) and (2) of this section by the ratio of the averaged monthly construction cost index for the 12-month period ending June 30 of the preceding calendar year over the averaged monthly construction cost index for the 12-month period ending June 30, 2008.
(b) The Department of Revenue shall determine the adjusted limitations under this section and shall report those limitations to entities imposing construction taxes. The department shall round the adjusted limitation under subsection (2) of this section to the nearest multiple of $100.
(c) As used in this subsection, "construction cost index" means the Engineering News-Record Construction Cost Index, or a similar nationally recognized index of construction costs as identified by the department by rule. [2007 c.829 §4; 2016 c.59 §5]