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    Dekalb County, IL Office Buildings for Sale

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    Five-Story Office Building
    Updated: May 4
    Five-Story Office Building

    155 N 3rd Street, Dekalb, IL 60115

    $199,500
    0.48 AC lot
    Approximately 30,000 sq. ft. across five floors, plus a 5,000 sq. ft. basement
    First floor configured for former bank use; office areas occupy floors 2 through 5
    Basement includes a drive‑through and functional walk‑in safe
    On‑site parking for around 22 vehicles
    Fiber installed and central air provided
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    Two-Building Office Property
    Updated: May 4
    Two-Building Office Property

    101 & 109 W Church Street, Sandwich, IL 60548

    $225,000
    0.17 AC lot
    Two office buildings totaling approximately 2,300 square feet
    Main building offers nearly 1,600 square feet across two stories
    Approximately 700‑square‑foot annex with office, kitchenette, and 1/2 bath
    Private parking lot with 13 spaces; sealcoated and restriped in 2025
    Rt 34 frontage with access from S. Wolfe Street, Rt 34, and adjoining alley
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    Freestanding Brick Office Building
    Freestanding Brick Office Building

    220 E State Street, Sycamore, IL 60178

    $183,000
    0.14 AC lot

    Multi-suite layout includes two kitchen areas, unit bathrooms, basement storage, and central air.

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    Turn a Listing Into an Investment Snapshot Cap Rate, Potential NOI, Demand score for every listing. Go To Analytics Center
    Five-Story Office Building with Drive-Through
    Five-Story Office Building with Drive-Through

    155 N 3rd Street, Dekalb, IL 60115

    $199,500
    30,000 sqft

    Downtown office property with flexible floorplans, fiber installation, on-site parking, and a basement walk-in safe.

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    Fully Leased Office Building
    Fully Leased Office Building

    129 E Locust Street, Dekalb, IL 60115

    $229,000
    0.06 AC lot

    Two-unit commercial layout with separate utility metering, dedicated mechanical systems, and a full basement.

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    Five-Story Office Building with Basement
    Five-Story Office Building with Basement

    155 N 3rd Street, Dekalb, IL 60115

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    35,000 sqft

    Five-story office building with basement, drive-through, on-site parking, and fiber installed.

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    Live-Work Building with Garage
    Live-Work Building with Garage

    499 E. State St, Sycamore, IL 60178

    Contact for pricing
    4,474 sqft

    Includes office space with a large 40x36 garage plus a one-bedroom apartment above.

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    Office Building
    Office Building

    920 Prairie, Sycamore, IL 60178

    Contact for pricing
    4,230 sqft

    Office building offered for sale with 4,230 SF of space.

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    Leased Mixed-Use Building
    Leased Mixed-Use Building

    303 - 343 E. State Street, Sycamore, IL 60178

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    Fully occupied commercial property combining office and industrial space with loading access and available signage.

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    Office Building for Sale
    Office Building for Sale

    1815 Mediterranean Dr, Sycamore, IL 60178

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    For sale office building offering 5,950 SF at 1815 Mediterranean Dr in Sycamore, Illinois.

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    Flexible Office Building
    Flexible Office Building

    511 W Main St, Genoa, IL 60135

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    Office property configured for one occupant or division into three separate units.

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    Mixed-Use Office and Apartment Building
    Mixed-Use Office and Apartment Building

    151 N 4th St, Dekalb, IL 60115

    Contact for pricing

    Mixed-use building with vacant apartments and multiple office units, plus basement parking garage and submitted rehab plans.

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    Renovated Historic Downtown Office Building
    Renovated Historic Downtown Office Building

    215 W Elm St, Sycamore, IL 60178

    Contact for pricing

    Renovated historic building with office space and some retail, featuring a new 50-year roof and hardwood floors.

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    Freestanding Office Building
    Freestanding Office Building

    135 S Sacramento Street, Sycamore, IL 60178

    Contact for pricing

    Freestanding building with two small offices, a large conference room, and bathroom with kitchenette.

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    Based on your search, we've compiled 18 Potential Opportunities for your consideration. Besides 14 Active listings in Dekalb County, IL, we suggest exploring several alternatives: plus 4 Land Listings that present a potential for development.

    Potential Development Sites for Consideration

    Can't find the perfect fit? These Land listings present an alternative path: the potential to develop a property for your specific goals.

    Important: These AI-suggestions are a starting point, not a guarantee of permitted use. All zoning, permitting, and land use information must be independently verified by you with the appropriate local authorities before making any commitments.

    Commercial Land Parcel
    Commercial Land Parcel

    St Charles, IL 60174

    $999,999
    2.05 AC lot

    Two-parcel commercial land offering within the Foxfield Commons PUD.

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    Triangular Corner Commercial Land
    Triangular Corner Commercial Land

    Huntley Road lot: 009, Carpentersville, IL 60110

    $550,000
    2.41 AC lot

    Corner parcel near the Randall Road corridor, positioned across from Liberty Elementary School.

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    Corner Development Site For Sale
    Corner Development Site For Sale

    IL - 62 Algonquin Rd., Barrington Hills, IL 60010

    Contact for pricing

    Prime corner development site with high traffic counts.

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    Commercial Land with Road Frontage
    Commercial Land with Road Frontage

    2234 S Eola Road, Aurora, IL 60503

    $475,000
    1.06 AC lot

    Commercial land in Aurora with COMMR zoning and stated flexibility for several business uses.

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    Dekalb County, IL Office Buildings Market Trends and Statistics

    Explore 14 office buildings for sale in Dekalb County, IL, showcased through 14 active listings on our real estate platform. These investment opportunities span a total of 73,704 square feet of properties for sale, with an estimated market value of $1,036,000.

    Sale prices for office properties in Dekalb County, IL start at $183,000, averaging $207,200, and reaching up to $229,000 — 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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