ADUs are allowed in Unincorporated UnionTypes:DetachedInternal
Types:DetachedInternal
Accessory Dwelling Unit (ADU) Rules for Unincorporated Union, NC
Is your property eligible for an ADU?
# of Properties
38,047
Owner-occupied
67%
Zoning districts
94
Avg Home Value
$498,565
Median Lot Size
1.00 acres
Avg Income
$115,175
Residential Types:
38,047 housing units
Other
100%
Zoning Districts:
45,766 parcels · 94 districts
RA-40
55%(25,301)
R-40
12%(5,330)
RA-20
7%(3,111)
R-20
6%(2,797)
Other
20%(9,227)
ADU Rules
What can you build in Unincorporated Union, NC?
Unincorporated Union, NC 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 50% of the principal dwelling unit’s size for internal or attached ADUs.
Detached ADU Size Limits
- –Maximum size of a detached ADU is 50% of the size of the principal dwelling unit.
Max Units
- –1 ADU per parcel on lots with a single principal dwelling unit (internal/attached or detached).
- –0 ADU per lot on duplexes/multi-unit lots.
Owner Occupancy
- –No owner-occupancy requirement.
Parking
- –2 spaces per ADU; only parking for the new unit (not to cure existing deficit); tandem spaces may count for household living; no off-site or shared parking; alternative ratios via a parking study.
Rental Restrictions
- –Short-term rentals (<30 days) prohibited; minimum lease term is month-to-month or longer.
ADU State Law
What can you build in North Carolina?
- –North Carolina does not have a statewide ADU mandate; ADU rules are set by individual municipalities.
- –Building/fire codes are set statewide, but whether an ADU is allowed is local zoning.
- –There is active proposed legislation (H627 / S495, "Regulation of Accessory Dwelling Units") that would create G.S. 160D-917 and require local governments to allow at least one ADU in certain single-family areas, but it is not enacted.
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 North Carolina municipalities
Rules change at the town line. Check the municipality your property is actually in.
Union County