# 300 E River St E #350, Ketchum, ID 83340 > **TL;DR:** 4bd/5ba condo, $11,750,000 ($3376/sqft), built 2026, 3,480 sqft. > Fireplace, 2-car garage. Est. $62,841/mo. Listed 6 days. ## Property at a Glance | Attribute | Value | |-----------|-------| | Price | $11,750,000 | | Price/sqft | $3376 | | Bedrooms | 4 | | Bathrooms | 4 full, 1 half | | Square Feet | 3,480 | | Year Built | 2026 | | Stories | 1 | | Garage | 2-car | | Property Type | Condo (Condominium) | | Status | Active | | Days on Market | 6 | ## Estimated Monthly Costs | Category | Amount | |----------|--------| | Principal & Interest (20% down, 30-year at 6.5%) | $59,414 | | Estimated Insurance | $3,427 | | **Total** | **$62,841** | ## Key Amenities - Fireplace - 2-car garage ## Property Highlights - Built in 2026 - Fireplace ## Description ### Agent Description The Observatory Sun Valley, A Viceroy Resort, offers twelve single-level penthouse residences with sweeping mountain views, with only eight remaining. The only 4-bedroom residence remaining features 4 en suite baths plus a powder room, an approx. 900 SF partially covered terrace, and unobstructed views of Bald Mountain, the southern hills, Wood River Valley and Dollar Mountain. Adorning The Observatory Sun Valley, A Viceroy Resort, twelve single-level penthouse residences with sweeping views of Idaho's Rocky Mountains are coming to life. Only eight remain available. West wing, Highway 75 side, south and east views with full unobstructed views of Bald Mountain, the southern hills and down the Wood River Valley, and views east to Dollar Mountain. 3,480 saleable square feet. The only four-bedroom, 4 ensuite bath and powder room, remaining for purchase. This includes an approximate 900 square foot exterior terrace assigned exclusively as limited common area. The exterior terrace is partially covered as well by the exterior "butterfly" roof that extends to the south. Ownership of these singular residences includes highly personalized service and access to a full suite of amenities, from a spa and fitness center to thermal pools, meeting spaces, cafe, restaurant, bar, ski concierge, and a state of the art observatory conveniently located at the gateway to downtown Ketchum and just minutes from all the mountain adventures Sun Valley has to offer. ## Location - **Address:** 300 E River St E #350, Ketchum, ID 83340 - **County:** Blaine - **Coordinates:** 43.678984, -114.361241 - **Google Maps:** https://www.google.com/maps?q=43.678984,-114.361241 ## Listing Agent - **Name:** Burnett Properties - **Brokerage:** Keller Williams Sun Valley Southern Idaho - **Broker Phone:** (208) 622-7722 - **Listing URL:** [View original listing](https://www.realtor.com/realestateandhomes-detail/300-E-River-St_Ketchum_ID_83340_M99517-02014?f=listhub&s=SVBORID-26&m=335089&c=propsimple) ## Photos ![300 E River St E #350 - Photo 1](http://lh.rdcpix.com/a1ad0e4a1d96f013c825a9e3dcb52235l-f3552000840r.jpg) ![300 E River St E #350 - Photo 2](http://lh.rdcpix.com/a1ad0e4a1d96f013c825a9e3dcb52235l-f60273731r.jpg) ![300 E River St E #350 - Photo 3](http://lh.rdcpix.com/a1ad0e4a1d96f013c825a9e3dcb52235l-f980030186r.jpg) ![300 E River St E #350 - Photo 4](http://lh.rdcpix.com/a1ad0e4a1d96f013c825a9e3dcb52235l-f2518331464r.jpg) ![300 E River St E #350 - Photo 5](http://lh.rdcpix.com/a1ad0e4a1d96f013c825a9e3dcb52235l-f1865536191r.jpg) ![300 E River St E #350 - Photo 6](http://lh.rdcpix.com/a1ad0e4a1d96f013c825a9e3dcb52235l-f2774018583r.jpg) ![300 E River St E #350 - Photo 7](http://lh.rdcpix.com/a1ad0e4a1d96f013c825a9e3dcb52235l-f690843927r.jpg) ![300 E River St E #350 - Photo 8](http://lh.rdcpix.com/a1ad0e4a1d96f013c825a9e3dcb52235l-f4157809413r.jpg) ![300 E River St E #350 - Photo 9](http://lh.rdcpix.com/a1ad0e4a1d96f013c825a9e3dcb52235l-f2135985516r.jpg) ![300 E River St E #350 - Photo 10](http://lh.rdcpix.com/a1ad0e4a1d96f013c825a9e3dcb52235l-f1201123385r.jpg) ![300 E River St E #350 - Photo 11](http://lh.rdcpix.com/a1ad0e4a1d96f013c825a9e3dcb52235l-f2532915579r.jpg) ![300 E River St E #350 - Photo 12](http://lh.rdcpix.com/a1ad0e4a1d96f013c825a9e3dcb52235l-f3840120847r.jpg) --- **MLS#:** 26-335089 | **Updated:** 2026-11-06 **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.ai/listing/300-e-river-st-e-ketchum-id-83340-fd72e90aef1f4779b8d4843e8fac2c53) --- ## Structured Data ```json { "@context": "https://schema.org", "@type": "RealEstateListing", "@id": "https://www.propertysimple.ai/listing/300-e-river-st-e-ketchum-id-83340-fd72e90aef1f4779b8d4843e8fac2c53#listing", "url": "https://www.propertysimple.ai/listing/300-e-river-st-e-ketchum-id-83340-fd72e90aef1f4779b8d4843e8fac2c53", "name": "300 E River St E #350, Ketchum, ID 83340", "description": "The Observatory Sun Valley, A Viceroy Resort, offers twelve single-level penthouse residences with sweeping mountain views, with only eight remaining. 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