Relating to the treatment of a replacement structure for a structure that was rendered uninhabitable or unusable by a casualty, a natural disaster, or wind or water damage as a new improvement for ad valorem tax purposes.

This bill changes Texas property tax rules for homeowners rebuilding after disasters. It exempts standard replacement structures (matching the original size and exterior materials) from being counted as "new improvements" that increase property taxes. Homeowners affected include those who rebuilt after qualifying disasters like hurricanes, floods, or accidents that made their homes uninhabitable. The rule applies only if the replacement structure doesn't exceed the original size or use higher-quality exterior materials. This prevents tax hikes for basic repairs without altering tax rates for larger or upgraded rebuilds.