ADUs are allowed in BonhamTypes:DetachedInternal
Types:DetachedInternal
Accessory Dwelling Unit (ADU) Rules for Bonham, TX
Is your property eligible for an ADU?
# of Parcels
4,273
Zoning districts
13
Avg Parcel Value
$312,358
Zoning Districts:
4,351 parcels · 13 districts
R
46%(2,015)
A1
13%(581)
D
11%(462)
LB
8%(361)
Other
21%(932)
ADU Rules
What can you build in Bonham, TX?
Bonham, TX follows state and local rules for Accessory Dwelling Units. Here is a concise overview of the local rules.
Eligibility
- –Internal / Attached ADU: Special Permit
- –Detached ADU: Special Permit
Interior / Attached ADU Size Limits
- –Maximum internal ADU size of 900 sq ft.
- –Maximum internal ADU size of 80% of the primary dwelling’s gross floor area.
Detached ADU Size Limits
- –Maximum size of 80% of the primary residence gross floor area
- –Maximum size of 900 sq ft
Parking
- –2 off-street spaces per ADU (guest house with kitchen); primary dwelling requires 2 spaces per unit; no double-counting; guest house with kitchen allowed only on lots ≥20,000 sq ft; if no kitchen, no ADU-specific parking.
Rental Restrictions
- –Guest House may not be rented or used as a separate dwelling; maximum stay six months. Servant's/Caretaker's/Guard's Residence cannot be rented as an independent dwelling.
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.
Fannin County