O'Neil House

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Located in Kalispell's historic downtown, and one of the original mansions built in 1909, this timeless property has been meticulously maintained and updated over its impressive 115 year history. Currently zoned RA-1, it supports various uses including residential, multi-family, and commercial purposes. With approximately 3,000 square feet of office or living space and an additional 1,500 sqft of unfinished basement or storage, this property presents endless possibilities for its new owner to continue Kalispell's legacy and embark on their own American Dream. Welcome to 509 1st Ave West, The O'Neil House! As you approach this Craftsman-style home you're welcomed by a grand hardwood cantilever porch supported by large, round wooden pillars with a matching second-level porch above. Step through the front door and you'll find original oak flooring, intricate windows, a wood fireplace, and numerous spaces ideal for entertaining, displaying art, or setting up an office. The property includes 6 bedrooms and 2 bathrooms, ample built-in storage, and 8-9 foot ceilings. A glass-enclosed mudroom at the back entrance leads to the expansive quarry stone basement, perfect for storage or potential bonus work or living space. Modern updates include a new boiler system from the early 2000s, updated electrical and plumbing systems, a new 30-year roof installed in 2023, and restructured chimneys and flashing. Additional features include underground sprinklers on timers, at least 8 customer parking spaces on-site, and ample public parking surrounding half of the building on the corner lot. Envision your business or personal home just 15 minutes from Flathead Lake, 45 minutes from two ski resorts, and a short drive from Glacier National Park. The O'Neil House offers boundless potential. Call Austin Baumgarten 406-471-1847, Holly Naldrett 406-407-2355, Ryan Norris 406-212-4201,, or your real estate professional.

Property Details of 509 1st Avenue W

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Based on information submitted to Montana Regional MLS as of July 15, 2026 2:07 PM UTC. All data is deemed reliable but is not guaranteed accurate by the MLS. All information should be independently reviewed and verified for accuracy. IDX information is provided exclusively for consumers’ personal, noncommercial use and may not be used for any purpose other than to identify prospective properties consumers may be interested in purchasing.

 
 

 

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