Amends the Property Tax Code. Creates a residential new construction homestead exemption. Provides that the county board of a county with more than 3,000,000 inhabitants, or any other county that elects to be a qualified county, may designate one or more geographic areas within the county as eligible areas. Sets forth certain requirements for an area to be designated as an eligible area. Provides that newly constructed homestead property that is located in an eligible area is entitled to a residential new construction homestead exemption equal to 50% of the assessed value of the property in the current taxable year. Provides that the exemption shall continue for a period of 10 consecutive taxable years or until the property is sold, transferred, or conveyed to a subsequent owner (other than a subsequent owner that meets certain specified conditions), whichever is earlier. Effective immediately.