Black Hills State University: Can an R-3 lot smaller than 8,000 square feet support an unlimited multifamily conversion?

DIRECT ANSWER

Online2026S-2municipal text may lag later ordinances; no parcel approval inferred. This is density/lot-area capacity, not the R-1 second-unit CUP decision.

The retained Spearfish R-3 text limits lots smaller than 8,000 square feet to two dwellings per lot under its post-July 2014 density provision. It separately sets lot-size exceptions and other area, parking and open-space conditions. Test the parcel’s dates, size and approved use before underwriting a third dwelling. Permission for multifamily use as a category does not remove this numeric small-lot constraint.