Sun Valley Legacy Estate & Development Masterpiece. Discover the pinnacle of mountain living at 120 Keystone St, a premier 52-acre legacy estate in the exclusive Elkhorn area of Sun Valley, Idaho. This rare dual-parcel landholding (18.6 & 33.5 acres) offers a breathtaking canvas for a private horse property or a high-end boutique residential development. The Ultimate Equestrian & Outdoor Retreat: Bordering U.S. Forest Service land, the estate provides unparalleled private canyon access for horseback riding and hiking. Secure your legacy with 1883 water rights (irrigation/stock) and a high-yield well. The property features a serene pond with on-site geothermal potential, creating a year-round alpine oasis for wildlife and residents alike. Developer Upside & Infrastructure: Zoned BC/R-10 with patented mining claims, the land is ready for a luxury compound or multi-homesite project. Utilities (well, septic, buried power) are already installed. Significant val Search address on YouTube for video tours.
| MLS # | 98979014 |
|---|---|
| Listing Type | For Sale |
| Sub-Type | Resale |
| Status | Active |
| Days On Site | 149 |
| Listing Provided By | Keller Williams Sun Valley Southern Idaho | James Tautkus |
| Zoning | BC/R-10 (UIB) |
|---|---|
| Acreage | 52.00 |
| Water Front | Yes |
| Property View | Yes |
| Lot Features | Over 40 Acres, Pasture, Sloped, Views, Wooded, Borders Public Owned Land |
|---|---|
| Fencing | Fence/Livestock |
| Utilities | Propane, Phone Connected, Electricity Connected, Sewer Connected, Underground Utilities |
|---|---|
| Sewer | Septic Tank |
| Electric | Installed |
| Tax Year | 2025 |
|---|---|
| Tax Annual Amount | 1206.84 |
| Tax Legal Description | Elkhorn 46, Keystone 41 A, Carbon Hill 74 A, SEC 15 4N 18E |
| State | ID |
|---|---|
| County | Blaine |
| City | Sun Valley |
| Zip Code | 83353 |
| Area | Blaine |
| Community Name | Elkhorn Sub |
| Listing VS Median (in Elkhorn Sub) | |
Price: $4,900,000 low | high Med: $0 On site: 149 low | high Med: | |
| State | ID |
|---|---|
| County | Blaine |
| City | Sun Valley |
| Zip Code | 83353 |
| Area | Blaine |
| Community Name | Elkhorn Sub |
| Listing VS Median (in Elkhorn Sub) | |
Price: $4,900,000 low | high Med: $0 On site: 149 low | high Med: | |