A sprawling riverfront mansion in American Falls, Idaho, has taken an unusual route to a new owner: rather than selling through a conventional luxury-home transaction, the estate was offered at a no-reserve auction with proceeds designated for charity.
The property at 2595 Highway 39 occupies approximately 5.28 acres along the Snake River, overlooking the American Falls Reservoir. Previously listed for $3.86 million, the 12,782-square-foot residence was offered through Platinum Luxury Auctions on September 17, 2026, with 100% of the proceeds earmarked for St. Jude Children’s Research Hospital and the Mayo Clinic. Current MLS records now show the property as pending, although a final auction price has not been publicly reported.
For a property of this scale, the combination of waterfront acreage, an unusually large residence and charitable disposition makes the American Falls estate an outlier in the Idaho luxury real estate market.
A 5.3-Acre Estate on the Snake River
The property sits directly on the banks of the Snake River, one of the Pacific Northwest’s major waterways, with broad views across the American Falls Reservoir.
The approximately 5.28-acre site also faces the American Falls dam, whose history stretches back to the early 20th century. The original dam was constructed in the 1920s and later rebuilt in the 1970s, creating the reservoir that now forms the visual centerpiece of the property.
The setting gives the estate a distinctly private character. Rather than simply offering a view of a lake from a distant hillside, the residence occupies an actual waterfront position, with the grounds extending toward the water.
The listing also highlights approximately 370 feet of waterfrontage and the property’s historical use of a private boat-dock area.
Perhaps more significantly for prospective buyers, Platinum Luxury Auctions said the property carries rights to construct a boat dock along the waterfront.
“The value proposition is substantial in this case,” Trayor Lesnock, founder and president of Platinum Luxury Auctions, said. “The property has highly rare and valuable rights to construct a boat dock along the waterfront, which we understand to be a privilege unique to this property versus any of its other, waterfront neighbors.”
That waterfront entitlement adds an element of recreational value that goes beyond the property’s architectural scale.
A 12,782-Square-Foot Idaho Mansion
Constructed in 1995, the main residence contains 12,782 square feet across multiple levels and has four bedrooms and 4.5 bathrooms. The property also includes a three-car garage.
Inside, the home reflects a more traditional interpretation of luxury than the minimalist architecture found in many contemporary trophy properties.
Rich wood paneling, red carpeting and cathedral ceilings establish the tone throughout much of the residence. The interiors were designed around volume and craftsmanship, with generous rooms intended for both formal entertaining and extended family living.
The architectural centerpiece is the double-height great room.
The space is wrapped almost entirely in wood, including a substantial decorative fireplace mantel and built-in bookshelves. Above the principal living area, a mezzanine overlooks the room, finished with a carved wooden banister that reinforces the property’s lodge-like character.
For an Idaho home surrounded by open land and water, the aesthetic feels closely connected to its setting: substantial, warm and deliberately removed from the visual language of a conventional suburban residence.
A Basement Built for Entertaining
The scale continues below the principal living areas.
The fully finished lower level includes a home theater, full bar and gym, creating an entertainment zone that can operate independently from the formal rooms upstairs.
Additional amenities described in the current listing include a sauna and steam room connected to the exercise area, as well as a built-in safe room.
The combination makes the basement more than a secondary utility level. It functions as a private recreational wing, with spaces designed for movie nights, entertaining and wellness.
Upstairs, the residence opens toward the surrounding landscape through its waterfront-facing spaces. The property description emphasizes sweeping reservoir views, mature grounds and substantial outdoor areas, giving the estate a strong indoor-outdoor relationship despite its traditional interior architecture.
The Estate’s Long Connection to Knudsen Poor Farms
The seller is Knudsen Poor Farms LLC, a name with longstanding ties to American Falls.
According to the Mansion Global report and public records, the company has owned the property since at least the 1980s. Knudsen Poor Farms was once an operating farm associated with the late Bob Knudsen Jr.
The property therefore represents more than the sale of an exceptionally large residence. It marks a transition for an estate connected to a local agricultural legacy, moving from longstanding ownership into a new chapter through the auction process.
The ownership history also helps explain why the property was ultimately presented as a charitable sale rather than simply another luxury listing.
A $3.86 Million Listing Becomes a No-Reserve Auction
The mansion first appeared on the market in January 2026 with Jadon Whitworth of Silvercreek Realty Group at an asking price of $3.86 million. That figure remained the reference price when the property was transitioned to the luxury auction process.
Platinum Luxury Auctions began facilitating property viewings in August ahead of the September auction.
Unlike a conventional sale, the auction was advertised without reserve, meaning the property was to be sold to the highest bidder regardless of whether the final bid reached its former $3.86 million asking price.
The distinction is important. The $3.86 million figure should not be treated as the property’s final sale price. Current real-estate records show the property as pending following the September 17 auction, but publicly available records reviewed for this article do not yet identify the winning bid or final closed transaction price.
That leaves the ultimate market value of the estate to be determined by the auction outcome and subsequent closing records.
A Luxury Property With a Charitable Mission
The most unusual element of the transaction is what happens to the proceeds.
The seller’s estate directed that the proceeds be divided equally between St. Jude Children’s Research Hospital and the Mayo Clinic. According to Lesnock, both organizations were important to the seller and the remaining family.
The arrangement transforms what might otherwise be a conventional Idaho luxury property transaction into a philanthropic real-estate event.
At a time when high-value residential auctions are often promoted around celebrity ownership, architectural rarity or investment potential, this property’s defining story is different. The estate’s scale and waterfront setting attracted attention, but the intended charitable destination of the proceeds gives the sale its broader significance.
American Falls Real Estate on a Different Scale
American Falls is a relatively small Idaho community, making the 2595 Highway 39 estate particularly unusual within its local market.
Current market records show the property listed at roughly $302 per square foot based on its $3.86 million asking price and 12,782 square feet. By comparison, the estate’s sheer size places it in a different category from most conventional American Falls homes.
The residence is also distinctive because of its combination of acreage and waterfront access. A buyer is not simply acquiring a large house but a substantial private holding with river frontage, reservoir views, recreational possibilities and a highly developed interior.
Its location is relatively rural, with everyday travel generally requiring a vehicle, according to local property data. That seclusion is part of the appeal for buyers seeking privacy and expansive surroundings rather than proximity to a dense urban center.
A New Chapter for 2595 Highway 39
The September 17 auction marks a significant turning point for one of American Falls’ most substantial private residences.
Built in 1995 and expanded across more than 12,000 square feet, the mansion combines traditional wood-paneled interiors with a theater, bar, gym, spa amenities, extensive grounds and direct Snake River frontage.
Its former $3.86 million asking price established one benchmark, but the no-reserve auction was designed to let the market determine the property’s next value.
More importantly, the proceeds are intended to benefit two nationally recognized medical institutions rather than simply changing hands between buyer and seller.
As of the latest available real-estate records, 2595 Highway 39 is pending following the auction, while the final purchase price has yet to be publicly disclosed.
For californialuxuryhouses, the Idaho estate stands out as an unusual intersection of luxury real estate, waterfront land, longstanding ownership and philanthropy—a mansion whose next chapter is being written not only by the highest bidder, but by the charitable purpose behind the sale.