Fort Worth, TX Accessory Structures: Garage Conversions (2026)

Fort Worth regulates garage conversions under §5.301 of the Zoning Ordinance (Accessory Uses on Residential Lots) and Fort Worth Building Law (which adopts the International Residential Code). Converting a garage — whether attached or detached — into a bedroom, studio apartment, home office with bathroom, or full ADU is a change of use that triggers permitting.

PERMITS REQUIRED: You need a building permit from Fort Worth Development Services, plus electrical, plumbing, and mechanical permits if you add or relocate any of those systems. Plans must show: existing garage footprint, new room layout, egress windows or doors, ceiling height (minimum 7 feet under the IRC), insulation, smoke and CO alarms, and any new HVAC ductwork.

CODE COMPLIANCE ISSUES: Most attached garages were built to garage-grade standards — uninsulated walls, slab on grade, no vapor barrier, no egress-compliant windows. Converting them to habitable space requires upgrades for: thermal envelope (Title 24 / IECC equivalent as adopted), egress (at least one window with 5.7 sq ft clear opening, or an exterior door), ceiling height, electrical service capacity, and a permanent heat source.

SEPARATE-RESIDENCE RESTRICTION: §5.301 prohibits using a converted garage as a separate independent residence in one-family districts. You can build out a guest suite, in-law unit, or accessory dwelling for household members — but you cannot lease it as a stand-alone rental with a separate address and meter. In two-family ('B') and multi-family districts under §4.707, separate dwelling units may be allowed.

SETBACKS & HEIGHT: The converted structure must comply with side and rear setbacks for the primary dwelling and may not exceed the height of the primary residence.

PARKING REPLACEMENT: Fort Worth requires two off-street parking spaces for a single-family home under §6.201. If your garage conversion eliminates those covered spaces, you may need to provide replacement off-street parking (driveway pad expansion or a new parking area). Texas does not have a statewide preemption equivalent to California Government Code §65852.2 that waives replacement parking for ADU garage conversions.

TEXAS SB 840: SB 840 (effective September 1, 2025) caps parking requirements for qualifying mixed-use and multifamily projects on commercial-zoned sites at one space per unit. It does not change single-family garage-conversion rules.