ADU (Accessory Dwelling Unit)
Affordable housing and neighborhood stability are important public objectives in the City of San Antonio. In recent years, accessory dwellings have become an important method to permit families to remain in their homes by securing rental income, while at the same time providing affordable housing for the elderly, single-person households, students, and other needy populations. Accessory dwellings are also known as “carriage houses,” “granny flats,” or “echo homes” (an acronym for “elder cottage housing opportunities”). Detached and Attached ADUs are subject to different provisions.
The city’s UDC permits internal, attached, and detached accessory dwellings by right in multiple rural and residential districts, subject to use-specific standards (§35-311). These standards address owner occupancy, permitting, utilities, maximum occupancy, unit size, number of bedrooms, units per lot, parking area location, and setbacks (§35-371). The code’s off-street parking standards address accessory dwellings (§35-526).