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    O Fallon, IL
    Duplex

    O Fallon, IL Duplexes for Sale

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    Swansea, IL Shiloh, IL Freeburg, IL Smithton, IL Millstadt, IL Fairview Heights, IL Caseyville, IL Cahokia, IL
    25 properties
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    Duplex with Finished Basements
    Updated: Aug 15
    Duplex with Finished Basements

    O Fallon, IL 62269

    $675,000
    2,142 sqft 0.67 AC lot
    Two‑unit duplex with 2 bedrooms and 3 bathrooms on each side
    Left side: ~1,375 sq ft with ~500 sq ft garage; right side: 1,420 sq ft with ~490 sq ft garage
    Each unit includes approximately 725 sq ft of partially finished basement space
    0.67‑acre property at 106 S Lawn Avenue, O'Fallon, IL 62269
    Covered composite decks overlook a deep backyard
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    Two-Unit Duplex with Off-Street Parking
    Updated: Aug 18
    Two-Unit Duplex with Off-Street Parking

    517 Mascoutah Avenue, Belleville, IL 62220

    $129,900
    1,813 sqft 0.39 AC lot
    Two‑unit duplex with 1,813 square feet of building area
    Each unit includes 2 bedrooms and 1 bathroom
    0.39‑acre parcel with off‑street parking and a deck
    Unit A furnace replaced in 2023
    Stucco construction dating to 1887
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    Brick Duplex with Carports
    Brick Duplex with Carports

    112 Kingsway Drive, Belleville, IL 62226

    $174,500
    2,032 sqft 0.21 AC lot

    Two ranch-style units each include two bedrooms, one bathroom, and a dedicated carport.

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    Cottage-Style Duplex
    Cottage-Style Duplex

    1214 Lebanon Ave, Belleville, IL 62221

    $130,000
    1,672 sqft

    Two one-bedroom units with off-street parking; one unit is currently rented.

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    Brick Duplex with Garages
    Brick Duplex with Garages

    314 W H Street, Belleville, IL 62226

    $144,000
    2,610 sqft 0.20 AC lot

    Two separately configured units include updated interiors, central air, forced-air heat, and private garage space.

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    Brick Duplex with Detached Garage
    Brick Duplex with Detached Garage

    609 E C Street, Belleville, IL 62220

    $243,000
    1,410 sqft 0.16 AC lot

    Two residential units feature private basements, laundry hookups, updated countertops, and rear parking with alley access.

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    Duplex with Detached Garage
    Duplex with Detached Garage

    2100 E Belle Avenue, Belleville, IL 62221

    $275,000
    2,304 sqft 0.35 AC lot

    Two three-bedroom residences each include a finished lower level, an attached garage, and a flexible bonus room.

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    Rehabilitated Duplex with Garage
    Rehabilitated Duplex with Garage

    314 W H St, Belleville, IL 62226

    $144,000
    2,610 sqft

    Two-unit property with varied bedroom layouts and rehabilitation completed in 2022.

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    Brick Ranch Duplex
    Brick Ranch Duplex

    170 Liberty Drive, Belleville, IL 62226

    $184,900
    2,216 sqft 0.23 AC lot

    Two-unit residential property with separate living spaces and one vacancy available for occupancy approval before closing.

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    Updated Duplex with Private Yard
    Updated Duplex with Private Yard

    619 E McKinley Street, Belleville, IL 62220

    $129,900
    2,344 sqft 0.20 AC lot

    Two-unit property with refreshed finishes, separate living spaces, and a private backyard in Belleville.

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    Two-Unit Duplex with Basement Storage
    Two-Unit Duplex with Basement Storage

    124 N Virginia Ave, Belleville, IL 62220

    $160,000
    1,120 sqft

    Both residences include upper-level bedrooms and a main-floor half bath.

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    Corner Duplex Property
    Corner Duplex Property

    O Fallon, IL 62269

    $400,000
    0.35 AC lot

    B-1-zoned property with two two-bedroom units and frontage along Highway 50 and Brookside.

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    Two-Unit Duplex with Basement
    Two-Unit Duplex with Basement

    1610 W Main Street, Belleville, IL 62220

    $89,900
    1,232 sqft 0.06 AC lot

    A front one-bedroom residence and two-level rear unit provide distinct layouts, with C-2 zoning.

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    Renovated Duplex Near Main Street
    Renovated Duplex Near Main Street

    29 N 14th St, Belleville, IL 62220

    $159,000
    1,122 sqft

    Two-unit residential property with one recently updated apartment available for occupancy.

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    Two-Unit Duplex Property
    Two-Unit Duplex Property

    O Fallon, IL 62269

    $259,000
    2,040 sqft 0.21 AC lot

    Both residences are occupied and equipped with central air.

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    Two-Unit Duplex with Carports
    Two-Unit Duplex with Carports

    18 Kingsway Drive, Belleville, IL 62226

    $169,900
    2,100 sqft 0.19 AC lot

    Stone construction includes central air, forced-air heating, and public water service.

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    Two-Unit Duplex with Carports
    Two-Unit Duplex with Carports

    112 Kingsway Dr, Belleville, IL 62226

    $174,500
    2,032 sqft

    Each residence includes two bedrooms, one bathroom, and a dedicated covered parking space.

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    Two-Unit Duplex with Off-Street Parking
    Two-Unit Duplex with Off-Street Parking

    517 Mascoutah Ave, Belleville, IL 62220

    $129,900
    1,813 sqft

    Two-bedroom units offer a practical residential income configuration.

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    Brick Duplex with Private Basements
    Brick Duplex with Private Basements

    609 E C St, Belleville, IL 62220

    $243,000
    1,410 sqft

    Two updated three-bedroom units include hardwood floors, separate laundry hookups, and generous interior space.

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    Two-Unit Duplex with Attached Garages
    Two-Unit Duplex with Attached Garages

    48 Eastland Drive, Belleville, IL 62221

    Contact for pricing
    2,344 sqft

    Fully occupied duplex with separate attached garages and month-to-month tenancy.

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    Renovated Duplex with C-2 Zoning
    Renovated Duplex with C-2 Zoning

    1610 W Main St, Belleville, IL 62221

    $89,900
    1,232 sqft

    Two-unit property with a one-bedroom front residence and a two-bedroom rear residence over two levels.

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    Two-Unit Duplex with Eat-In Kitchens
    Two-Unit Duplex with Eat-In Kitchens

    411 N 5th St, Belleville, IL 62220

    $55,000
    1,132 sqft

    The property includes one vacant unit and one currently occupied unit.

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    Updated Two-Unit Duplex
    Updated Two-Unit Duplex

    619 E Mckinley St, Belleville, IL 62220

    $129,900
    2,344 sqft

    Two-unit property with one occupied residence and a recently refreshed vacant unit.

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    Updated Duplex with Detached Garage
    Updated Duplex with Detached Garage

    1411 N Charles Street, Belleville, IL 62221

    $199,000

    Two-unit property with one residence leased and the other available for occupancy.

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    O Fallon, IL Duplexes Market Trends and Statistics

    Explore 25 duplexes for sale in O Fallon, IL, showcased through 25 active listings on our real estate platform. These investment opportunities span a total of 41,074 square feet of properties for sale, with an estimated market value of $4,489,200.

    Sale prices for duplexes in O Fallon, IL start at $55,000, averaging $195,182, and reaching up to $675,000 — offering options for a variety of budgets and business needs. Daily updated analytics ensure you stay ahead with the latest data and market trends.

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    Top Commercial Asset Segments

    Commercial property segments ranked by active listings on the market

    Duplexes 3
    Apartment buildings 1

    Demographics Overview

    Population 36K
    Population Growth (5Y) +11.0%
    Median Household Income $100,167
    College Educated 74.8%

    High-Yield Neighborhoods for Investment

    Identify O Fallon submarkets with the highest inventory density on the market and evaluate the average listing prices of real estate assets

    Neighborhood Average Price
    62269 $399.8K

    Taxes & Financing

    Average Loan-to-Value 65.0%

    Listings Trend

    New vs delisted commercial listings in St. Clair County

    New Delisted

    Total CRE Inventory on Market (SF)

    Average Property Price per SF

    For-sale pricing trends across core commercial property types in St. Clair County

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    Most Searched ZIP Codes in O Fallon, IL

    • 62220
    • 62221
    • 62226
    • 62269

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