Terra Non Migliorata Sun Valley

Discover 120 Keystone St, a premier 52-acre legacy estate for sale in the exclusive Elkhorn area of Sun Valley, Idaho. Positioned just minutes from downtown Ketchum and the Sun Valley Resort, this rare dual-parcel landholding--comprising 18.6 and 33.5 acres--offers an unparalleled opportunity for a private equestrian compound or a boutique luxury residential development. Bordering U. S. Forest Service land, the property provides direct, private canyon access for horseback riding, hiking, and outdoor recreation right from your back door.

Appraised at $10.5M, this Sun Valley real estate asset combines pristine natural amenities with exceptional utility. The land is anchored by senior 1883 water rights for irrigation and stock, a high-yield well, and a serene pond with on-site geothermal potential. Ready for immediate development, the property features BC/R-10 zoning with patented mining claims, along with installed infrastructure including well, septic, and buried power.

Significant value-add and investment upside include a prospective 18-acre USFS land swap to expand contiguous acreage, as well as a recent site analysis indicating potential for a third building site to increase overall density. As one of the last large private landholdings in a supply-constrained Blaine County market, the seller is offering flexible acquisition terms, including owner financing (owner carry paper) for up to five years with 50% down. Search ”120 Keystone St Sun Valley” on YouTube to view complete video tours.