ADUs are allowed in Rapid CityTypes:DetachedInternal
Types:DetachedInternal
Accessory Dwelling Unit (ADU) Rules for Rapid City, SD
Is your property eligible for an ADU?
# of Parcels
28,666
Zoning districts
28
Avg Parcel Value
$559,242
Median Parcel Size
0.22 acres
Zoning Districts:
28,643 parcels · 28 districts
LDR-1
49%(14,069)
MDR
27%(7,710)
LDR-2
7%(1,908)
GC
6%(1,738)
Other
11%(3,218)
ADU Rules
What can you build in Rapid City, SD?
Rapid City, SD 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
Detached ADU Size Limits
- –Maximum detached ADU footprint of 10% of lot area
- –Detached ADU must be smaller than the primary dwelling's footprint (excluding attached garage)
Owner Occupancy
- –Owner must reside full-time in the main dwelling or ADU
Parking
- –3 off-street spaces total (2 for the main dwelling, 1 for the ADU); no reductions or exemptions stated; must comply with city ordinances and the Infrastructure Design Criteria Manual
Rental Restrictions
- –Owner-occupancy required; cannot rent both units simultaneously. Short-term rentals require vacation-home registration and state lodging license; occupancy limit is 2 persons per bedroom plus 2.
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 South Dakota municipalities
Rules change at the town line. Check the municipality your property is actually in.
Pennington County