TX HB3919

Applies to municipalities with populations over 90,000 located in counties with populations over 300,000, prohibiting them from requiring residential lots larger than 1,400 square feet, wider than 20 feet, or deeper than 60 feet on unplatted tracts of 5+ acres zoned for single-family homes

Prohibits affected municipalities from enforcing density requirements that result in fewer than 31.1 dwelling units per acre on qualifying tracts

Defines "small lot" as 4,000 square feet or less and prohibits municipalities from requiring such lots to have setbacks greater than 5 feet, covered parking, more than one parking space per unit, more than 30% open space, or fewer than three stories

Exempts short-term rentals (less than 30 days), flooding/sewer/well water requirements, and areas within one mile of law enforcement training centers in counties with population between 2.6-2.7 million from the new restrictions

Allows adversely affected persons or housing organizations to sue municipalities for violations, with courts authorized to award declaratory judgments, injunctions, economic damages, and mandatory attorney's fees to prevailing claimants; waives governmental immunity for such suits