# 120 Keystone St, Sun Valley, ID 83353

> **TL;DR:** land, $5,250,000.
> Waterfront. Est. $22,750/mo. Listed 81 days.

## Property at a Glance

| Attribute | Value |
|-----------|-------|
| Price | $5,250,000 |
| Lot Size | 2,265,120 sqft (52.00 acres) |
| Property Type | Land (Single Family Residence) |
| Status | For Sale |
| Days on Market | 81 |

## Why This Home Stands Out

- **Waterfront** - Direct water access

## Estimated Monthly Costs

| Category | Amount |
|----------|--------|
| Mortgage (20% down, 6.5%) | $22,750 |
| **Total** | **$22,750** |

## Key Amenities

- Waterfront

## Property Highlights

- 52.00 acre lot
- Waterfront

## Description

### Agent Description
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. Search address on YouTube for video tours. 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 value-add opportunities exist through a potential 18-acre USFS land swap, and recent analysis indicates potential for a third building site, offering even greater density and investment value. Strategic Opportunity: Located minutes from Ketchum and Sun Valley Resort, this $10.5M-appraised asset is offered with flexible acquisition options. Owner will carry paper for up to five years with 50% down; other terms are negotiable. Control one of the last large private holdings in a supply-constrained market.

## Location

- **Address:** 120 Keystone St, Sun Valley, ID 83353
- **County:** Blaine
- **Coordinates:** 43.677231, -114.303313
- **Google Maps:** https://www.google.com/maps?q=43.677231,-114.303313

## Listing Agent

- **Name:** James Tautkus
- **Brokerage:** Keller Williams Sun Valley Southern Idaho
- **Phone:** (208) 622-7722
- **Email:** buywithnicole@gmail.com

## Primary Photo

![120 Keystone St - Primary Photo](http://lh.rdcpix.com/bd23c82ccea570526e39271953b97337l-f1350975304r.jpg)

*39 total photos available on [listing page](https://www.propertysimple.com/listing/120-keystone-st-sun-valley-id-83353-6334170)*

---

**MLS#:** 26-334170 | **Updated:** 2026-06-18
**Source:** listhub

*Copyright © 2026 Sun Valley Board of Realtors. All rights reserved. All information provided by the listing agent/broker is deemed reliable but is not guaranteed and should be independently verified.*

[View on PropertySimple](https://www.propertysimple.com/listing/120-keystone-st-sun-valley-id-83353-6334170)

---

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