405 and 415 Sonstelie Road, Kalispell, MT 59901

$4,000,000

Bedrooms: 4
Bathrooms: 1 | 2
Sq. Ft.: 2,557
Type: House
Request Information
Offering apx 250 ft of Flathead River frontage, this exceptional 28+ acre homestead-era property presents a rare blend of privacy, legacy, and opportunity just minutes from Kalispell. A U-shaped dock with two pontoon-sized boat bays enhances the riverfront recreational access. Built in 1905, the 1.5-story farmhouse features 4 bedrooms & 3 bathrooms, reflecting Montana's early settlement character while offering functional living space. This legacy property combines productive land, multiple outbuildings, and significant river frontage, creating flexibility for a luxury riverfront estate, working agricultural operation, recreation-focused retreat, or generational holding. The Flathead River setting offers boating, fishing, and wildlife viewing directly from the property, while proximity to Kalispell provides convenient access to services, dining, and the airport. A truly rare opportunity to own a substantial riverfront holding with history, infrastructure, and enduring value. Additional improvements include a 768 sq ft finished garage, a 2,100 sq ft implement shed, a newer 1,872 sq ft shop with attached 432 sq ft lean-to, two 384 sq ft steel storage sheds with concrete floors & overhead doors, & another 160 sq ft shed. 6 grain bins with aerators offer approximately 60,000 bushels of capacity. Plus 4 separate water rights convey. With expansive acreage, premier river access and historic roots, this property offers exceptional versatility for recreation, agricultural use, or long-term investment. Though early legal homestead documentation may reside in county archives, the Sonstelie family name has been present in Kalispell since at least the late 1800s. Over the decades, generations of the family have worked, lived, and shaped life in the valley -- from agricultural enterprise to community leadership. The very road on which this property sits carries that legacy forward, anchoring this land in local history as surely as the roots that spread across these 28+ acres.
Property Features
Location Information
Latitude: 48.16848976
Longitude: -114.16086104
Directions: Hwy 35 South, Egan Slough Rd turnoff, follow 1.1 mile to Egan Slough Rd then left on Sonsteile Rd, follow slightly left into driveway
Interior Features
Interior: Main Level Primary
Full Baths: 1
3/4 Baths: 2
Number of Fireplaces: 0
Heating: Baseboard, Electric, Gas, Propane, Stove
Cooling: Ductless, Window Unit(s)
Appliances: Dryer, Range, Refrigerator, Water Softener, Washer
Basement Description: Unfinished
Has Basement: Yes
Exterior Features
Style: Ranch
Levels: One and One Half
Construction: Vinyl Siding, Wood Frame
Exterior: Dock, Garden, Rain Gutters, RV Hookup, Storage, Propane Tank - Owned, Propane Tank - Leased
Foundation: Poured
Water Source: Well
Septic or Sewer: Private Sewer, Septic Tank
Utilities: Electricity Connected, Propane, Phone Connected
Parking Description: Additional Parking, Boat, Circular Driveway, RV Access/Parking
Has Attached Garage: No
Garage Spaces: 4
Irrigation: Deeded Water Rights, Well
Patio / Deck Description: Deck
Other Structures: Grain Storage, Other, Shed(s), Well House, Workshop
Is a Horse Property: Yes
Lot Features: Agricultural, Back Yard, Corners Marked, Front Yard, Garden, Landscaped, Secluded, Views, Level
Topography: Level
Lot Size in Acres: 28.08
Lot Size in Sq. Ft.: 1,223,164
Road Description: County Road, Gravel
Waterfront Name: Flathead River
Waterfront Description: Dock Access, Navigable Water, River Access, Waterfront
Has Waterfront: Yes
View Description: Mountain(s), Creek/Stream, Trees/Woods
Additional Information
Property Type: SFR
Property SubType: Single Family Residence
Year Built: 1905
Status: Active
Tax Year: 2025
Tax Amount: $1,175.38


$ per month
Year Fixed. % Interest Rate.
Principal + Interest: $
Monthly Tax: $
Monthly Insurance: $
Term
yrs
Interest Rate
 % 
Down Payment
$
List Price:
$
Based on a fully amortized fixed rate loan. Ask your agent for the tax rates in your area. Insurance estimate is based on an average cost, your final premium cost will be determined by the type of coverage you select. This program only provides an estimate.

Seller's Representative: Rena Saunier, Big Sky Properties of Montana, Inc.

Logo
Copyright 2020 Montana Regional MLS. All rights reserved.
IDX information is provided exclusively for consumers' personal, non-commercial use, may not be used for any purpose other than to identify prospective properties consumers may be interested in purchasing, and is deemed reliable but is not guaranteed accurate by the Montana Regional MLS.
Montana Regional data last updated at January 23, 2026, 10:30 PM MT