ADUs are allowed in Iowa ColonyTypes:DetachedInternal
Types:DetachedInternal
Accessory Dwelling Unit (ADU) Rules for Iowa Colony, TX
Is your property eligible for an ADU?
# of Properties
6
Zoning districts
7
Zoning Districts:
1,055 parcels · 7 districts
SFR
52%(546)
PUD
32%(339)
MH
9%(93)
BR
5%(57)
Other
2%(20)
ADU Rules
What can you build in Iowa Colony, TX?
Iowa Colony, 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
Detached ADU Size Limits
- –Maximum size of 900 sq ft for a detached accessory dwelling unit (backyard cottage).
Max Units
- –1 detached secondary dwelling unit per lot (max 900 sq ft) in single-family Planned Unit Developments on lots under 6,600 sq ft
Owner Occupancy
- –No owner-occupancy requirement.
Parking
- –2 spaces/ADU; no max. Exceptions: detached ADU ≤900 sq ft treated as single-family; 9 ft by 18 ft driveway segment within lot may count as a space; spaces must be on an all-weather surface.
Rental Restrictions
- –Servants' quarters occupancy limited to full-time employees and their families; effectively prohibits renting to others in ADUs.
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.
Brazoria County