ADUs are allowed in MansfieldTypes:DetachedInternal
Types:DetachedInternal
Accessory Dwelling Unit (ADU) Rules for Mansfield, TX
Is your property eligible for an ADU?
# of Properties
25,441
Owner-occupied
19%
Zoning districts
32
Avg Home Value
$412,003
Median Lot Size
0.21 acres
Avg Income
$142,308
Residential Types:
25,441 housing units
Single Family
18%
Apts (4+ units)
3%
Other
78%
Zoning Districts:
30,624 parcels · 32 districts
PD
25%(7,632)
SF-7.5/16
13%(3,898)
NZ
10%(3,043)
SF-8.4/18
9%(2,816)
Other
43%(13,235)
ADU Rules
What can you build in Mansfield, TX?
Mansfield, 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: Downtown (D) districts up to 800 sq ft; South Mansfield (S) districts up to 1,000 sq ft; otherwise the greater of 1,000 sq ft or 75% of the principal dwelling’s habitable area; in all cases not exceeding the principal dwelling’s habitable area.
Detached ADU Size Limits
- –Maximum detached ADU size by zone: Downtown 800 sq ft; South Mansfield form-based zones 1,000 sq ft; elsewhere the greater of 1,000 sq ft or 75% of the principal dwelling’s habitable area, but not more than the principal’s habitable area.
Max Units
- –1 ADU per lot
Owner Occupancy
- –No owner-occupancy requirement.
Parking
- –1 space/ADU citywide; in Downtown (D) and South Mansfield Form-based (S) districts: 1 space/ADU for 1 BR, 2 spaces/ADU for 2+ BR; no ADU-specific max; 4-5 ft paved walkway must connect ADU entry to all required parking; D/S parking rules prevail by bedroom count
Rental Restrictions
- –Short-term/vacation rentals are not permitted in typical residential zones; they may be allowed only if the underlying district permits that use.
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.
Tarrant County