ADUs are allowed in Mount HollyTypes:DetachedInternal
Types:DetachedInternal
Accessory Dwelling Unit (ADU) Rules for Mount Holly, NC
Is your property eligible for an ADU?
# of Properties
6,954
Owner-occupied
77%
Zoning districts
28
Avg Home Value
$368,588
Median Lot Size
0.28 acres
Avg Income
$81,843
Residential Types:
6,954 housing units
Single Family
96%
Apts (4+ units)
1%
Other
3%
Zoning Districts:
8,151 parcels · 28 districts
R-12SF
26%(2,160)
CD-R-8SF
19%(1,525)
R-10SF
17%(1,354)
R-8SF
9%(734)
Other
29%(2,378)
ADU Rules
What can you build in Mount Holly, NC?
Mount Holly, 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 is 25% of the principal building’s heated (habitable) floor area
Detached ADU Size Limits
- –Maximum size is the lesser of 50% of the principal building’s heated floor area and the size of the principal dwelling.
Max Units
- –Single-family: max 1 ADU per lot.
- –Duplex or multifamily: 0 ADUs (not permitted).
Owner Occupancy
- –No owner-occupancy requirement
Parking
- –No ADU parking minimum or maximum; ADU provisions do not state a parking requirement; citywide residential parking rules do not list ADUs, and B-1 District waives off-street parking.
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.
Gaston County