ADUs are allowed in AddisonTypes:DetachedInternal
Types:DetachedInternal
Accessory Dwelling Unit (ADU) Rules for Addison, TX
Is your property eligible for an ADU?
# of Properties
2,682
Owner-occupied
72%
Zoning districts
18
Avg Home Value
$1,344,885
Median Lot Size
0.14 acres
Avg Income
$100,567
Residential Types:
2,682 housing units
Single Family
72%
2-3 Family
3%
Apts (4+ units)
5%
Other
21%
Zoning Districts:
5,788 parcels · 18 districts
PD
44%(2,551)
CG
10%(600)
R-2
10%(597)
M-4
8%(484)
Other
27%(1,556)
ADU Rules
What can you build in Addison, TX?
Addison, 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 of 40% of the principal dwelling unit’s square footage
Detached ADU Size Limits
- –Maximum size is 40% of the principal dwelling unit's square footage.
Max Units
- –Single-family detached: 1 ADU/lot (attached or detached).
- –All other principal uses (duplex/triplex/fourplex/multifamily/other): 0 ADUs/lot.
Owner Occupancy
- –Owner must occupy either the main dwelling or the ADU
Parking
- –1 space per ADU; parking must be on the principal lot; on-street spaces cannot count for single-family detached lots; 20% transit proximity reduction does not apply to single-family detached ADUs
Rental Restrictions
- –Bed-and-breakfast lodging prohibited in any ADU; no other rental-term limits specified.
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.
Dallas County