Austin, TX Accessory Structures: Garage Conversions (2026)

Converting an attached garage into living space in Austin requires a Garage Conversion and Carport/Porch Enclosure permit alongside a Residential Interior Remodel application. Plans must show insulation, egress, smoke and CO alarms, ventilation, and a permanent heating and cooling source for the new conditioned space. Separate trade permits are required for plumbing, electrical, and HVAC relocation, for any structural or concrete work, and any time more than 64 sq ft of drywall is removed. If the conversion increases water demand or adds a dwelling unit, an Austin Water W&WW Service Plan Verification is required; an Austin Energy Building Service Plan Application is required if energy demand will increase. Austin removed citywide minimum off-street parking requirements in late 2023, but some properties still trigger replacement-parking conditions and HOA covenants may impose additional rules. When the conversion creates a second dwelling, ADU rules under the Land Development Code apply, including the HOME Initiative (Ord. 20231207-001) which allows up to three units on SF-1, SF-2, and SF-3 lots.