ADU rules for Alamo Heights
Accessory Dwelling Unit (ADU) Rules for Alamo Heights, TX
Is your property eligible for an ADU?
# of Properties
2,254
Owner-occupied
97%
Zoning districts
13
Avg Home Value
$888,753
Median Lot Size
0.21 acres
Avg Income
$192,408
Residential Types:
2,254 housing units
Single Family
100%
Zoning Districts:
2,598 parcels · 13 districts
SF-A
64%(1,654)
SF-B
17%(449)
MF-D
12%(311)
B-1
3%(85)
Other
4%(99)
ADU Rules
What can you build in Alamo Heights, TX?
Alamo Heights, TX follows state and local rules for Accessory Dwelling Units. Here is a concise overview of the local rules.
Eligibility
- –Internal / Attached ADU: Not addressed in the local bylaw
- –Detached ADU: Not addressed in the local bylaw
Parking
- –2 spaces/ADU; SF-A/SF-B: spaces must be covered (garage/carport/porte-cochère); 2F-C: 2 spaces/ADU (1 may be uncovered); no max; exceptions: curb-cut limits (corner lots up to 24 ft) and front-yard parking restrictions; 2F-C parking behind the front face of the building.
Rental Restrictions
- –Detached ADU not for rent or use as a separate dwelling; only employees on the premises may use it
ADU State Law
What can you build in Texas?
- –Texas does not have a statewide ADU law. ADUs are regulated entirely at the local level.
- –ADU rules vary significantly by city, and many jurisdictions prohibit ADUs outright.
- –Counties generally lack zoning authority, but other restrictions may still apply outside city limits.
- –Outside city limits, ADU feasibility often depends on subdivision rules, deed restrictions, and septic or fire requirements.
- –Building/fire codes are set statewide, but whether an ADU is allowed is local zoning.
What's allowed on your lot?
These are the municipality-wide rules. What's allowed on a specific property also depends on state laws, setbacks, floor area ratio, lot coverage, environmental constraints, topography, and other property-specific factors. Search your address on FutureLot to see what's allowed on your property.
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ADU rules in other Texas municipalities
Rules change at the town line. Check the municipality your property is actually in.
Bexar County