ADUs are allowed in MidlothianTypes:DetachedInternal
Types:DetachedInternal
Accessory Dwelling Unit (ADU) Rules for Midlothian, TX
Is your property eligible for an ADU?
# of Properties
8,590
Owner-occupied
81%
Zoning districts
95
Avg Home Value
$391,029
Median Lot Size
0.22 acres
Avg Income
$121,823
Residential Types:
8,590 housing units
Residential
100%
Zoning Districts:
11,548 parcels · 95 districts
PD
57%(6,581)
SF-4
11%(1,261)
R-3
7%(820)
R-2.5
5%(544)
Other
20%(2,342)
ADU Rules
What can you build in Midlothian, TX?
Midlothian, 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: on lots under 1 acre, 50% of the primary dwelling’s air-conditioned floor area; on lots 1 acre or larger, the greater of 75% of that area or 1,800 sq ft.
Detached ADU Size Limits
- –Maximum detached ADU size based on the primary home’s air-conditioned floor area: under 1 acre = 50%; 1 acre or more = 75% or 1,800 sq ft, whichever is greater.
- –Detached ADU in an accessory building must also meet accessory building floor area limits: under 1 acre, the lesser of 50% of first floor or 4% of lot; 1 to under 2 acres, the lesser of 75% of first floor or 4% of lot; 2+ acres, 4% of lot area.
Max Units
- –1 ADU per tract or platted lot (all residential districts, where permitted)
Owner Occupancy
- –Owner occupancy is not required.
Parking
- –1 space/ADU; must meet same off-street parking standards as the principal dwelling; no transit-based reductions or waivers
Rental Restrictions
- –ADU cannot be leased separately from the main dwelling; no separate/independent leasing.
- –Occupancy restricted to relatives of the primary occupant or owner's employees/contractors (and their spouse/child/parent); unrelated third-party tenants are not permitted.
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.
Ellis County