Leander, TX Accessory Structures: Garage Conversions (2026)

The City of Leander Composite Zoning Ordinance, Article IV, Section 5, provides that 'an enclosed garage structure is considered as part of the primary building / structure even if it is detached.' That makes a garage conversion a modification of the principal dwelling rather than a new accessory building. The practical constraint is parking: the single-family use components require a set number of garage-enclosed spaces (for example, dwellings with three or more bedrooms, or lots with an accessory dwelling, must provide a minimum of two garage-enclosed parking spaces plus two additional off-street spaces). Converting the garage to habitable space can eliminate those required enclosed spaces, so applicants must show how the lot still meets its parking obligation. If the converted area is finished as an independent living unit with a kitchen, it falls under the ordinance's accessory dwelling rules (minimum 400 square feet, maximum 900 square feet or 40% of the primary dwelling, and allowed only where the lot's site component permits an ADU). All conversion work requires a building permit, which Leander processes online through its Development Hub, and must comply with the city's adopted building codes (the 2021 ICC code package). Applicants should confirm parking and zoning compliance with the Permits & Building Inspection Department before starting.