ADUs are allowed in MurphyTypes:DetachedInternal
Types:DetachedInternal
Accessory Dwelling Unit (ADU) Rules for Murphy, TX
Is your property eligible for an ADU?
# of Properties
104
Owner-occupied
36%
Zoning districts
29
Avg Home Value
$21,507
Median Lot Size
0.36 acres
Avg Income
$196,639
Residential Types:
104 housing units
M4
100%
Zoning Districts:
6,604 parcels · 29 districts
SF-9/SF-11/SF-15
27%(1,761)
SF-9/SF-11/SF-20
26%(1,743)
SF-9/SF-11
13%(832)
SF-11
9%(592)
Other
25%(1,676)
ADU Rules
What can you build in Murphy, TX?
Murphy, 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 size limited by the total accessory structures floor area: the larger of 50% of the residence’s livable area or 5% of lot area.
Max Units
- –1 ADU per lot (AG and SF-E)
Owner Occupancy
- –Owner must occupy either the principal or ADU
Parking
- –No ADU parking minimum or maximum; ADUs are not assigned parking spaces; general off-street parking applies to other residences
Rental Restrictions
- –Detached ADU: not rented; ADUs in AG and SF-E shall not be leased or sublet.
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.
Check my propertyHow can we help you?
Get matched with trusted local builders
Understand what's allowed on your property
Learn the key rules and size limits for ADUs
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.
Collin County