ADUs are allowed in MissionTypes:DetachedInternal
Types:DetachedInternal
Accessory Dwelling Unit (ADU) Rules for Mission, TX
Is your property eligible for an ADU?
# of Properties
19,747
Owner-occupied
66%
Zoning districts
18
Avg Home Value
$227,417
Median Lot Size
0.17 acres
Avg Income
$75,387
Residential Types:
19,747 housing units
Other
100%
Zoning Districts:
27,130 parcels · 18 districts
R-1
54%(14,630)
R-4
9%(2,451)
R-1A
8%(2,068)
PUD
7%(1,816)
Other
23%(6,165)
ADU Rules
What can you build in Mission, TX?
Mission, TX follows state and local rules for Accessory Dwelling Units. Here is a concise overview of the local rules.
Eligibility
- –Internal / Attached ADU: Conditional Use Permit
- –Detached ADU: Conditional Use Permit
Owner Occupancy
- –No owner-occupancy requirement.
Rental Restrictions
- –Guesthouses cannot be rented in any district.
- –Garage apartments/separate servant's quarters may not be leased outside R-2/R-3; renting is allowed in R-2/R-3, with short-term stays under 30 days requiring STR registration.
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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Is your property eligible for an ADU?
ADU rules in other Texas municipalities
Rules change at the town line. Check the municipality your property is actually in.
Hidalgo County