TX HB2480

Defines accessory dwelling units (ADUs) as independent residential units located on lots zoned for single-family homes or duplexes that serve as complete living facilities

Authorizes municipalities and counties to adopt ordinances regulating ADUs, including allowing construction before, after, or concurrent with primary dwellings, permitting sales or leases, and allowing conversion of existing structures

Permits local governments to charge impact fees on ADUs larger than 800 square feet and impose additional fees or exactions such as parkland or right-of-way dedications

Allows lots of at least 10,000 square feet to have two accessory dwelling units and authorizes local governments to regulate ADU design elements including shape, size, and massing

Preserves the authority of historic preservation rules, deed restrictions, and homeowners association rules to limit or prohibit ADU construction, and maintains local government authority to apply short-term rental regulations to ADUs