Boulder, MT Duplexes for sale

Updated: Oct 24, 2025

Duplex Property with Oversized Garage

508 & 510 W 1st Avenue, Boulder, MT 59632

$433,900

0.59 AC lot

0.585‑acre parcel with two residential units
Main residence offers 1,836 square feet, 3 bedrooms, and 2 bathrooms
Tenant‑occupied mobile home includes 3 bedrooms and 1 bathroom
Detached oversized 2‑car garage for parking or storage
Additional electrical and water connection for a possible 3rd home

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Based on your search, we've compiled 5 Potential Opportunities for your consideration. Besides 1 Active listings in Boulder, MT, we suggest exploring several alternatives: 4 properties in Nearby Cities

Opportunities in Nearby Cities

Here are 4 Similar properties we found in Nearby Locations for your consideration.

Leased Two-Home Duplex

1712 George Street, Butte, MT 59701

$239,000

0.11 AC lot

Two residences share one parcel, with both homes currently leased and equipped with ranges and refrigerators.

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Ranch-Style Duplex with Garage

410 S Montana Avenue, Helena, MT 59601

$450,000

2,300 sqft

Main and lower levels each include a kitchen, living area, and dining space.

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Updated Two-Unit Duplex

1941 Phillips Ave, Butte, MT 59701

$275,000

Two residences offer remodeled interiors and extensive system upgrades, with one-bedroom, one-bath layouts in each unit.

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Side-by-Side Condo Duplex

2406 Sunlight Cir, Helena, MT 59601

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Two side-by-side condo units were converted from a duplex in 1985; one is vacant while the other has been rented.

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Neighborhood	Average Price
59632	$433.9K

Neighborhood

Average Price

59632

$433.9K

Boulder, MT Duplexes for Sale

508 & 510 W 1st Avenue, Boulder, MT 59632