ADUs are allowed in KerrvilleTypes:DetachedInternal
Types:DetachedInternal
Accessory Dwelling Unit (ADU) Rules for Kerrville, TX
Is your property eligible for an ADU?
# of Parcels
10,673
Zoning districts
18
Avg Parcel Value
$344,234
Zoning Districts:
10,507 parcels · 18 districts
R-1
36%(3,832)
R-2
23%(2,409)
R-1A
16%(1,717)
PD
4%(437)
Other
20%(2,112)
ADU Rules
What can you build in Kerrville, TX?
Kerrville, TX follows state and local rules for Accessory Dwelling Units. Here is a concise overview of the local rules.
Eligibility
- –Internal / Attached ADU: By Right
- –Detached ADU: By Right
Interior / Attached ADU Size Limits
- –Maximum size is 50% of the primary dwelling’s floor area (excluding the ADU and any attached garage) in the R-1A district.
Detached ADU Size Limits
- –Maximum detached ADU size is 50% of the main dwelling’s total floor area.
Max Units
- –Single-family (R-1A): 1 ADU per lot.
- –Duplex/multifamily: none specified.
Parking
- –Min 4 spaces total (2 main + 2 ADU); max not specified. Exceptions: garage/carport/open lot/driveway parking; tandem spaces count if on same lot; ZBA may authorize reductions; joint-use parking allowed for complementary uses.
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.
Kerr County