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120 Keystone Sun Valley, ID $ 5,250,000
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120 Keystone
$ 5,250,000
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120 Keystone

Sun Valley, ID, 83353
$ 5,250,000
Baths0.0

Monthly Estimate*

$ 32,325

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View a Virtual Tour
Studio

Lots and Land for sale in Sun Valley, ID

for $5,250,000. The lot size is 52.

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 senior 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.

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Lots and Land Active

Price

$ 5,250,000

Bedrooms

Studio

Property Type

Lots and Land

Taxes

$ 1,206

Style

Lot Size

52

Town/City

Sun Valley

County/Region

Blaine

MLS | Web ID

98979014
Features
General
Sewer Septic Tank
Utilities Propane
Electric Installed
Property Subtype Build to Suit Residential
Tax Year 2025
Current Use 2-4 Units
Ownership Fee Simple
Waterfront Features Pond/Stream/Creek
Additional Parcels Description RP1M0000000760
County Blaine
Property Type Land
Subdivision Name Elkhorn Sub
Status New
Directions Located at the gated private terminus of Keystone Street within the exclusive Elkhorn community of Sun Valley Idaho. This 52-acre landholding offers rare 'end-of-the-road' seclusion and serves as the ultimate gateway to Keystone Gulch the Sawtooth National Forest and Sun Valley Resort.
City Sun Valley
Zoning Description BC/R-10 (UIB)
MLS Area Blaine-Custer County - 1525
Lot Size Units Acres
Lot Size Square Feet 2265120
Listing Terms Cash
Tax Annual Amount 1206.84
Virtual Tour https://youtu.be/dt4Q_1tvgq4?si=NGYdCyxonsAfk0R3
Building Area Units Square Feet
Living Area Units Square Feet
Standard Status Active
Legal Description Elkhorn 46 Keystone 41 A Carbon Hill 74 A SEC 15 4N 18E
LeasableAreaUnits Square Feet
Freehold IDX
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Interior
Below Grade Finished Area Unit Type Square Feet
Above Grade Finished Area Unit Type Square Feet
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Exterior
Fencing Fence/Livestock
Lot Features Over 40 Acres
Water Source Well
Lot Size Area 52
Lot Size Acres 52
Road Surface Type Dirt
Waterfront Y/N true
Road Frontage Type Easement
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* Excluded Features
List By
James Tautkus

Listing Agent

Keller Williams Sun Valley Southern Idaho

Broker

jamestautkus@kw.com

Email

Affordability Calculator

$32,426
Per Month
100%
0%
0%
Monthly Principal & Interest
$32,325
Monthly Property Taxes
$101
Monthly Home Insurance
--
Default based on a 30-year fixed rate of 6.25% with 20% down. The estimated payment is offered for convenience and is not an offer of credit. Due to market fluctuations, interest rates are subject to change at any time and without notice. Your individual rate may vary. Rates may differ for FHA, VA or jumbo loans.
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Nearby
4827338 Elementary School
4827337 Middle School
Unknown High School High School
See complete school information
Pricing History
DatePricePrice ChangeDescription
3/23/2026$5,250,000 Listed Price

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120 Keystone, Sun Valley, ID, 83353 is a Lots and Land for sale at $5,250,000 with a lot size of 52. 120 Keystone is a studio with 0.0 baths. The property's zip code is 83353 which is in Sun Valley, ID

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