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    O Fallon, IL Office Spaces for Sale

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    22 properties
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    Two-Building Storefront Property
    Updated: May 15
    Two-Building Storefront Property

    O Fallon, IL 62269

    $275,000
    3,036 sqft 0.21 AC lot
    3,036‑square‑foot commercial property on 0.21 acres
    Two buildings with multiple ground‑floor commercial suites
    Separate upper‑level entrance at 102 W. 7th
    Paved parking lot between the buildings
    Built in 1897 with metal siding and shingle roof
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    Flexible-Layout Office Building
    Updated: Aug 21
    Flexible-Layout Office Building

    503 S Illinois Street, Belleville, IL 62220

    $150,000
    0.15 AC lot
    1915 construction with brick‑and‑frame materials
    Multiple rooms suitable for office areas, workspaces, or suites subject to approval
    Heavy Commercial zoning; multifamily grandfathering reported by the City
    Full bath, dining or office area, laundry nook, and cellar storage
    Fresh paint completed in several rooms; additional finishing work remains
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    Office Building with Multiple Suites
    Office Building with Multiple Suites

    626 N 38th Street, Belleville, IL 62226

    $120,000

    A mix of completed and unfinished private offices is arranged alongside shared gathering and dining areas.

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    Remodeled Office Building with Warehouse
    Remodeled Office Building with Warehouse

    1520 Mascoutah Ave, Belleville, IL 62220

    $490,000
    8,454 sqft

    Remodeled office building with warehouse, ample parking, and generator.

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    Refurbished Two-Level Office
    Refurbished Two-Level Office

    6 Lebanon Avenue, Belleville, IL 62220

    $56,000
    0.03 AC lot

    Two-level layout provides separate workrooms, a shared bathroom, and refreshed interior finishes.

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    Flex Space with Warehouse and Office
    Flex Space with Warehouse and Office

    O Fallon, IL 62269

    Contact for pricing
    10,977 sqft 1.79 AC lot

    B-2 General Business property combines office, showroom, and shop areas with multiple overhead doors and substantial parking.

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    Medical Office Space with Six Exam Rooms
    Medical Office Space with Six Exam Rooms

    5300 W Main St, Belleville, IL 62226

    Contact for pricing
    2,500 sqft

    Well-maintained former dental office with six exam rooms, a reception area, and washer/dryer hookups on W Main Street.

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    Office-Flex Facility with Dock Doors
    Office-Flex Facility with Dock Doors

    65 S 65th St, Belleville, IL 62223

    Contact for pricing
    12,960 sqft

    Office-flex building includes multiple offices and bullpen space plus eight 8’x9’ OHDs.

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    Office-Warehouse Flex Building
    Office-Warehouse Flex Building

    1550-1562 Frontage Rd, O Fallon, IL 62269

    Contact for pricing
    20,176 sqft

    Office and warehouse configuration with interstate frontage-road access and available suites.

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    Built-Out Medical Office Suite
    Built-Out Medical Office Suite

    2900 Frank Scott Pkwy W, #960, Belleville, IL 62223

    Contact for pricing
    2,706 sqft

    Well-maintained, fully built-out office with exam, recovery, lab, and multiple private workrooms on two levels.

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    Medical Office in Copper Bend
    Medical Office in Copper Bend

    2900 Frank Scott Pkwy W, Belleville, IL 62223

    Contact for pricing
    2,030 sqft

    2,030 SF medical office in established office park.

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    Commercial Property with Insulated Garage
    Commercial Property with Insulated Garage

    7100 Old Saint Louis Rd, Belleville, IL 62223

    $120,000

    Commercially zoned property with office, retail, automotive, and live-work configuration potential.

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    East Belleville Office/Retail Building
    East Belleville Office/Retail Building

    1820 N Belt E, Belleville, IL 62221

    Contact for pricing
    2,496 sqft

    Freestanding 2,496 SF office/retail building in East Belleville.

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    Medical Office Unit with Storage
    Medical Office Unit with Storage

    9-2900 Frank Scott Pkwy W, Belleville, IL 62223

    $140,000

    Medical/office unit in an established business park with a finished basement, two bathrooms, and ample storage space.

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    Office Building with Full Basement
    Office Building with Full Basement

    110 W Main St, Belleville, IL 62220

    $350,000

    Main-level offices feature reception space, multiple bathrooms, and a large conference room for meetings and presentations.

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    Belleville Retail/Office Opportunity
    Belleville Retail/Office Opportunity

    648 Carlyle Ave, Belleville, IL 62221

    Contact for pricing
    3,557 sqft

    Retail/office space available for sale in Belleville, Illinois.

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    Renovated Office Building For Sale
    Renovated Office Building For Sale

    218 W Main St, Belleville, IL 62220

    Contact for pricing
    47,942 sqft 0.89 AC lot

    Two-story office building in historic downtown Belleville, Illinois.

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    Highway 50 Development Opportunity
    Highway 50 Development Opportunity

    O Fallon, IL 62269

    Contact for pricing
    1.42 AC lot

    1.42 acres on Highway 50 in O'Fallon, Illinois.

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    O'Fallon Mixed-Use Income Property
    O'Fallon Mixed-Use Income Property

    O Fallon, IL 62269

    Contact for pricing
    3,036 sqft

    High-traffic corner lot with multiple income streams in O'Fallon.

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    Multi-Story Office and Lodging Building
    Multi-Story Office and Lodging Building

    29 N 64th St, Belleville, IL 62223

    Contact for pricing
    40,896 sqft 4.09 AC lot

    Elevator-served, three-story building with a large parking lot and multiple redevelopment use possibilities.

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    Belleville Office Building For Sale
    Belleville Office Building For Sale

    29 N 64th St, Belleville, IL

    Contact for pricing
    40,896 sqft 4.09 AC lot

    40,896 sq ft office building on 4.09 acres.

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    Office Building with Large Rooms
    Office Building with Large Rooms

    28 W 64th St, Belleville, IL 62223

    Contact for pricing
    8,736 sqft

    Adaptable interior layout includes fire suppression and ADA-compliant features.

    View details
    Based on your search, we've compiled Potential Opportunities for your consideration. Besides 22 Active Listings in O Fallon, IL, we suggest to view alternatives - similar 15 Off-Market properties to explore as potential leads.

    Off-Market Properties in O Fallon, IL

    Consider similar Off-Market properties in O Fallon, IL. You may contact the owners directly to inquire about their potential intentions to sell. To help you make a strong first impression, we can assist by reaching out to these owners with compelling proposals created using our AI tool.

    717 Insight Ave
    OFFICE BUILDING

    717 Insight Ave, O Fallon, IL 62269-2151

    Estimated value:
    $325,000
    0.20 AC lot
    View details
    735 Insight Ave
    OFFICE BUILDING

    735 Insight Ave, O Fallon, IL 62269-2193

    Estimated value:
    $335,000
    0.14 AC lot
    View details

    O Fallon, IL Office Spaces Market Trends and Statistics

    Explore 37 office spaces for sale in O Fallon, IL, showcased through 22 active listings on our real estate platform. These investment opportunities span a total of 210,398 square feet of properties for sale, with an estimated market value of $1,701,000.

    Sale prices for office spaces in O Fallon, IL start at $56,000, averaging $212,625, and reaching up to $490,000 — 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

    Office Units 13
    Medical Office Space 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 $275K

    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)

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