ADUs are allowed in HuttoTypes:DetachedInternal
Types:DetachedInternal
Accessory Dwelling Unit (ADU) Rules for Hutto, TX
Is your property eligible for an ADU?
# of Properties
1,495
Owner-occupied
76%
Zoning districts
14
Avg Home Value
$327,361
Median Lot Size
0.18 acres
Avg Income
$136,764
Residential Types:
1,495 housing units
Residential
100%
Zoning Districts:
1,834 parcels · 14 districts
SF-1
73%(1,332)
OT-3
8%(146)
PUD
4%(69)
OT-4T
3%(63)
Other
12%(224)
ADU Rules
What can you build in Hutto, TX?
Hutto, 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 Internal ADU size: lesser of 800 sq ft or 33% of host living area
- –Old Town OT-3/OT-4R/OT-4T: maximum Internal ADU habitable area 600 sq ft, or 33% of host living area if smaller
- –Maximum Internal ADU size: lesser of 800 sq ft or 33% of host living area (SF-R/SF-1)
Detached ADU Size Limits
- –Maximum detached ADU size: 800 sq ft or 33% of host living area (HABITABLE_SQFT), whichever is smaller.
- –Old Town OT-3/OT-4R/OT-4T detached ADU maximum: 600 sq ft habitable area (excluding parking).
Max Units
- –Single-household lots: 1 ADU per lot
Parking
- –3 total spaces for 1 primary unit + 1 ADU (1.5 per dwelling). ADUs must attach at rear or be within a detached garage without eliminating parking; full detached-garage conversion prohibited. Tandem parking allowed; Form-Based Code/Old Town default to Sec.10.405.9 unless a district TFP changes it.
Rental Restrictions
- –Short-term rentals (30 days or less) of any residence, including an ADU, require a Specific Use Permit; otherwise not permitted as-of-right.
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.
Williamson County