ADUs are allowed in LucasTypes:DetachedInternal
Types:DetachedInternal
Accessory Dwelling Unit (ADU) Rules for Lucas, TX
Is your property eligible for an ADU?
# of Properties
21
Zoning districts
16
Zoning Districts:
2,379 parcels · 16 districts
R2
64%(1,520)
R1
16%(383)
R1.5
12%(296)
AO
4%(98)
Other
3%(82)
ADU Rules
What can you build in Lucas, TX?
Lucas, 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 of 900 sq ft by right for an internal or attached ADU.
- –With a Specific Use Permit, maximum size of 1,500 sq ft in R-2, R-1.5, R-1, and AO; otherwise remains 900 sq ft.
Detached ADU Size Limits
- –Maximum ADU size without a Specific Use Permit is 900 sq ft
- –Maximum ADU size with a Specific Use Permit in AO, R-1, R-1.5, and R-2 is 1,500 sq ft
Max Units
- –1 ADU per lot (AO, R-2, R-1.5, R-1, ED)
- –JADU: none specified
Owner Occupancy
- –ADU occupancy limited to owner or principal-dwelling occupant
Parking
- –No ADU parking requirement; off-street parking applies to principal units (2 spaces per unit) and may be off-site; no ADU parking allowed in the required front yard setback
Rental Restrictions
- –Detached and attached ADUs may not be rented as separate units from the principal dwelling; renting independently (including short-term rentals) is prohibited.
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.
Collin County