Relating to certain municipal regulation of conversion of certain office buildings to mixed-use and multifamily residential occupancy.

HB 5187 creates new regulations for converting office buildings to residential use in specific large Texas cities and counties. It applies only to municipalities over 90,000 population in counties over 300,000 population, requiring that converted buildings meet strict criteria: at least 65% residential space overall and per floor, with buildings constructed at least five years prior to conversion. The bill defines "mixed-use residential" (65% residential space) and "multifamily residential" (three or more dwelling units), while explicitly exempting historic preservation rules and short-term rentals from its requirements. This legislation standardizes conversion processes but does not override existing private property restrictions or historic district protections.