ADUs are allowed in RomaTypes:DetachedInternal
Types:DetachedInternal
Accessory Dwelling Unit (ADU) Rules for Roma, TX
Is your property eligible for an ADU?
# of Parcels
3,299
Zoning districts
11
Avg Parcel Value
$98,446
Median Parcel Size
0.17 acres
Zoning Districts:
3,168 parcels · 11 districts
SF
70%(2,203)
MU
7%(230)
MF
6%(189)
OPR
5%(173)
Other
12%(373)
ADU Rules
What can you build in Roma, TX?
Roma, 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: Conditional Use Permit
Interior / Attached ADU Size Limits
- –Maximum internal/attached ADU size is 1/3 of the principal dwelling’s gross floor area.
Parking
- –1 space/ADU; ADU must be within the principal dwelling and ≤1/3 of gross floor area; no reductions below primary parking; parking generally on the same lot
Rental Restrictions
- –Detached ADU: renting prohibited as a separate dwelling (limited to temporary guests; no kitchen facilities).
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.
Starr County