Relating to an exemption from ad valorem taxation of the amount of the appraised value of certain residential real property that arises from the installation in the property of certain energy efficiency-related improvements.

HB 1483 creates a property tax exemption for homeowners who install qualifying energy efficiency upgrades on residential properties built before 2011. The bill exempts the increased property value from taxes resulting from specific improvements like high-efficiency HVAC systems, attic insulation, smart thermostats, or energy-efficient windows, but only if installed on or after January 1, 2026. This exemption applies to the value increase from these upgrades, not the entire property, and remains in effect until the property changes ownership or the homeowner no longer qualifies. The law takes effect for the 2026 tax year and requires the comptroller to develop guidelines for local tax administrators.