ADUs are allowed in WillisTypes:DetachedInternal
Types:DetachedInternal
Accessory Dwelling Unit (ADU) Rules for Willis, TX
Is your property eligible for an ADU?
# of Properties
26
Owner-occupied
27%
Zoning districts
8
Avg Home Value
$328,808
Median Lot Size
0.34 acres
Avg Income
$58,299
Residential Types:
26 housing units
2-3 Family
23%
Apts (4+ units)
4%
Other
73%
Zoning Districts:
1,682 parcels · 8 districts
R-1
57%(963)
R-2
18%(311)
GC
18%(299)
PUB
2%(33)
Other
5%(76)
ADU Rules
What can you build in Willis, TX?
Willis, 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
Parking
- –1 space/ADU; max none; tandem parking allowed for single-family/two-family uses (ADU parking may be provided in tandem)
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.
Montgomery County