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ADUs are allowed in Unincorporated Richland
Types:DetachedInternal

Accessory Dwelling Unit (ADU) Rules for Unincorporated Richland, SC

Is your property eligible for an ADU?

# of Properties
15
Zoning districts
56
Zoning Districts:
117,436 parcels · 56 districts
R3
19%(21,855)
PD
18%(20,889)
R2
17%(19,797)
RT
15%(17,886)
Other
32%(37,009)

ADU Rules

What can you build in Unincorporated Richland, SC?

Unincorporated Richland, SC follows state and local rules for Accessory Dwelling Units. Here is a concise overview of the local rules.

Interior / Attached ADU Size Limits

  • –For an internal ADU in a single-family home, the maximum size is 500 sq ft or 25% of the home’s heated floor area, whichever is greater.

Detached ADU Size Limits

  • –Maximum size of 800 sq ft for a detached ADU in the DBWP Neighborhood Overlay District.

Max Units

  • –1 ADU per single-family dwelling per lot (may be detached or within the principal dwelling).
  • –0 ADUs on duplex or multifamily lots.

Parking

  • –1 space/ADU; maximum 1 space per ADU (impervious); additional spaces may exceed the maximum if constructed of pervious material as approved by the County Engineer. Remote parking within 400 ft; shared parking encouraged where peak demands do not overlap; CRD Overlay allows on-street parking to count toward the minimum.

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

ColumbiaIrmo
See all municipalities in Richland County →See all South Carolina municipalities →
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