ADUs are allowed in ColleyvilleTypes:DetachedInternal
Types:DetachedInternal
Accessory Dwelling Unit (ADU) Rules for Colleyville, TX
Is your property eligible for an ADU?
# of Properties
9,618
Owner-occupied
2%
Zoning districts
29
Avg Home Value
$869,498
Median Lot Size
0.44 acres
Avg Income
$200,248
Residential Types:
9,618 housing units
Apts (4+ units)
3%
Other
97%
Zoning Districts:
12,108 parcels · 29 districts
PUD-R
39%(4,766)
R-20
28%(3,443)
PUD-C
6%(763)
R-40
5%(625)
Other
21%(2,511)
ADU Rules
What can you build in Colleyville, TX?
Colleyville, 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 the most restrictive of 1,200 sq ft, 50% of the primary dwelling’s floor area, or 4% of lot area (combined accessory-building cap)
Detached ADU Size Limits
- –Maximum size of 1,200 sq ft
- –Maximum size of 50% of the primary structure’s gross floor area
- –Maximum size cannot exceed 4% of lot area (cap for all accessory buildings)
Rental Restrictions
- –No accessory building or accessory dwelling shall be rented.
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.
Tarrant County