ADU rules for Port Isabel
Accessory Dwelling Unit (ADU) Rules for Port Isabel, TX
Is your property eligible for an ADU?
# of Parcels
1,969
Zoning districts
10
Avg Parcel Value
$284,742
Median Parcel Size
0.14 acres
Zoning Districts:
1,471 parcels · 10 districts
R-1
54%(800)
B-2
21%(316)
R-1-A
8%(115)
R-2
5%(78)
Other
11%(162)
ADU Rules
What can you build in Port Isabel, TX?
Port Isabel, 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 permitted
Owner Occupancy
- –Owner occupancy not required.
Rental Restrictions
- –Detached ADU rentals prohibited; no accessory buildings may be used for dwelling purposes (except for domestic servants employed on the premises).
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.
Cameron County