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Illinois

Duplex

St Clair County, IL Duplexes for Sale

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Chicago, IL Springfield, IL Peoria, IL Rockford, IL Aurora, IL Belleville, IL Joliet, IL Champaign, IL

30 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

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

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.

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.

Two-Unit Duplex with C-2 Zoning

Two-Unit Duplex with C-2 Zoning

1610 W Main Street, Belleville, IL 62220

$77,000

1,232 sqft 0.06 AC lot

The front one-bedroom residence has C-2 zoning, alongside a two-bedroom unit arranged across two levels.

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.

2-Unit Duplex with Carports

2-Unit Duplex with Carports

9 Concord Dr, Millstadt, IL 62260

$210,000

1,920 sqft

Both residences have laundry hookups, covered parking, and dedicated storage areas.

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.

Occupied Brick Duplex

Occupied Brick Duplex

9 Concord Drive, Millstadt, IL 62260

$210,000

1,920 sqft 0.16 AC lot

Two ranch-style units include covered carport parking, storage space, and tenant occupancy in place.

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.

Brick Duplex with Covered Parking

Brick Duplex with Covered Parking

213 Brackett Street, Swansea, IL 62226

$169,900

1,350 sqft 0.20 AC lot

Two-unit property includes shared laundry and a recently updated kitchen and bathroom.

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.

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.

Two-Unit Income Duplex with Bonus Lot

Two-Unit Income Duplex with Bonus Lot

3312 Market Avenue, East St Louis, IL 62207

Contact for pricing

2,520 sqft 0.28 AC lot

Duplex with estimated 6-bedroom configuration plus adjacent vacant land sold together for flexible income and renovation planning.

Two-Unit Duplex with Garage

Two-Unit Duplex with Garage

1628 Gaty Avenue, East St Louis, IL 62205

Contact for pricing

1,760 sqft 0.10 AC lot

Two separate units are complemented by basement space and a two-car garage.

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.

Brick Duplex with Shared Laundry

Brick Duplex with Shared Laundry

213 Brackett St, Swansea, IL 62226

$169,900

1,350 sqft

Two two-bedroom units include shared laundry, covered rear parking, and an updated kitchen and bathroom in one unit.

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.

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.

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.

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.

Renovated Duplex with C-2 Zoning

Renovated Duplex with C-2 Zoning

1610 W Main St, Belleville, IL 62221

$77,000

1,232 sqft

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

Duplex with Full Basement

Duplex with Full Basement

1628 Gaty Ave, East St Louis, IL 62205

Contact for pricing

1,760 sqft

Two-unit residential property with basement space and a two-car garage, offered for exterior viewing only.

St Clair County, IL Duplexes Market Trends and Statistics

Explore 30 duplexes for sale in St Clair County, IL, showcased through 30 active listings on our real estate platform. These investment opportunities span a total of 49,524 square feet of properties for sale, with an estimated market value of $4,345,200.

Sale prices for two-family homes in St Clair County, IL start at $39,900, averaging $188,921, 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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Featured St. Clair County Real Estate Agencies

Realmo connects you with licensed St. Clair County CRE brokers providing property specifications, local market pricing, and commercial transaction underwriting support.

Strano & Associates

1910 Carlyle Avenue Belleville, IL 62221

Phone: 16182577690

www.strano.com

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