TX HB1779

Prohibits local governments from banning accessory dwelling units (ADUs) on lots zoned for single-family homes or duplexes, and bars requirements for owner occupancy, dedicated parking, minimum lot sizes larger than existing standards, or side/rear setbacks exceeding 5 feet

Limits local regulations on ADU size, requiring jurisdictions to allow units of at least 800 square feet or 50% of the primary dwelling's square footage, and prohibits design restrictions on shape, massing, or floor distribution

Bans impact fees for ADUs under 800 square feet and prohibits any ADU-specific fees or exactions such as parkland dedications; allows lots of 10,000+ square feet to have two ADUs

Requires political subdivisions to process ADU permit applications ministerially within 60 days, with automatic approval if no decision is made; permits are limited to building code, design standards, and fire code review

Authorizes the Attorney General to investigate complaints and penalize violating jurisdictions by restricting their ad valorem tax rate to the no-new-revenue rate for the following tax year; does not override HOA rules or deed restrictions