ADUs are allowed in IrmoTypes:DetachedInternal
Types:DetachedInternal
Accessory Dwelling Unit (ADU) Rules for Irmo, SC
Is your property eligible for an ADU?
# of Properties
24
Zoning districts
17
Zoning Districts:
6,200 parcels · 17 districts
RS
72%(4,435)
R1
6%(399)
CG
6%(374)
RG
4%(263)
Other
12%(729)
ADU Rules
What can you build in Irmo, SC?
Irmo, SC follows state and local rules for Accessory Dwelling Units. Here is a concise overview of the local rules.
Eligibility
- –Internal / Attached ADU: Conditional Use Permit
- –Detached ADU: Conditional Use Permit
Size Limits
- –Maximum size of 50% of the principal dwelling’s gross floor area
Max Units
- –1 ADU per single-family lot
- –0 ADUs per lot for duplex, townhouse, and multifamily
Owner Occupancy
- –The principal dwelling must be owner-occupied.
Parking
- –1 space/ADU; parking must be on the same lot; may be waived or satisfied off-site if public on-street parking abuts, or a public lot/garage within 750 ft is approved, or an off-site facility within 750 ft with easement approved by Planning Commission.
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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Is your property eligible for an ADU?
ADU rules in other South Carolina municipalities
Rules change at the town line. Check the municipality your property is actually in.
Richland County