ADUs are allowed in ShermanTypes:DetachedInternal
Types:DetachedInternal
Accessory Dwelling Unit (ADU) Rules for Sherman, TX
Is your property eligible for an ADU?
# of Parcels
19,479
Zoning districts
18
Avg Parcel Value
$381,683
Zoning Districts:
19,439 parcels · 18 districts
R-6
78%(15,216)
PD
6%(1,151)
C-1
5%(916)
C-2
4%(748)
Other
7%(1,408)
ADU Rules
What can you build in Sherman, TX?
Sherman, 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
Detached ADU Size Limits
- –Maximum detached ADU size is the remaining building area allowed by the district lot coverage cap (R-A 40%, R-E 20%, R-12 40%) on lots at least 12,000 sq ft in those zones.
Parking
- –1 space per garage plus 1 per bedroom up to 4 total; no ADU-specific reductions/waivers; spaces behind front property line; ADUs allowed only on lots ≥12,000 sq ft in R-A, R-E, or R-12.
Rental Restrictions
- –Detached ADUs cannot be rented or leased.
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.
Grayson County