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Illinois

Office

St Clair County, IL Office Spaces for Lease

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54 properties

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Multi-Suite Office and Retail Building

Updated: Jun 25

Multi-Suite Office and Retail Building

O Fallon, IL 62269

$1,765/Mo

Brick commercial property built in 2001 with forced‑air heating and central air
Multiple lease suites available at approximately 1,200 to 2,400 SF, including a double suite and a highly visible corner suite
NNN lease rates of $14.00–$15.00 per SF annually; tenants responsible for utilities
Dual front and rear entrances plus private restrooms, private offices, and reception areas in available suites
Utilities served by public water; suites have passed City of O'Fallon inspections and have current occupancy permits

Former Dental Office with Exam Rooms

Updated: May 27

Former Dental Office with Exam Rooms

5300 West Main Street, Belleville, IL 62226

Contact for pricing

2,500 sqft

2,500 SF former dental office built in 1979, available for sale or lease
Front reception area with built‑in reception desk plus dedicated file room for efficient workflow
Six exam rooms or private offices for flexible patient‑facing or private workspace use
Back‑office support includes break room with washer/dryer hookups and a kitchenette/lab area
Located along West Main Street in West Belleville for convenient access near established commercial corridors

Former Dental Office with Exam Rooms

Former Dental Office with Exam Rooms

5300 W Main St, Belleville, IL 62226

Contact for pricing

2,500 sqft

Move-in-ready 2,500 sq ft former dental office with reception, six exam rooms/offices, and a kitchenette/lab area.

Turn a Listing Into an Investment Snapshot Cap Rate, Potential NOI, Demand score for every listing. Go To Analytics Center

Flex Space with Warehouse Shop

Flex Space with Warehouse Shop

O Fallon, IL 62269

Contact for pricing

10,977 sqft 1.79 AC lot

B-2 General Business property combining offices, showroom space, and a warehouse-shop component with multiple overhead doors.

Updated Attorney Office Space

Updated Attorney Office Space

10326 Lincoln Trl, Fairview Heights, IL 62208

Contact for pricing

1,680 sqft

Updated 1,680 SF office suite with reception, six offices, a conference room, and basement break area with storage.

Swansea Creative Sublease Opportunity

Swansea Creative Sublease Opportunity

33 Bronze Pointe Boulevard, Swansea, IL 62226

$10 SF/Yr

21,800 sqft

Creative, medical, or professional services sublease in Swansea, Illinois.

Professional Office Suite on Main

Professional Office Suite on Main

7200 West Main Street, Belleville, IL 62223

Contact for pricing

1,944 sqft

Well-appointed office suite with seven private offices, conference space, and ample on-site parking on West Main Street.

Medical Office Space with Exam Rooms

Medical Office Space with Exam Rooms

2900 Frank Scott Pkwy W, Belleville, IL 62226

Contact for pricing

3,857 sqft

Leasable medical office with an oversized waiting room and seven exam rooms in the Copper Bend Centre office park.

Demisable Office Suite in Park

Demisable Office Suite in Park

12 Emerald Terrace, Swansea, IL 62226

Contact for pricing

2,615 sqft

Main-level office suite totals 2,615 SF and can be demised into 1,167 SF or 1,448 SF configurations.

Medical or Office Suite with 9-Foot Ceilings

Medical or Office Suite with 9-Foot Ceilings

O Fallon, IL 62269

Contact for pricing

5,776 sqft

Suite C offers a divisible 5,776 SF office/medical layout with 9-foot ceilings, private offices, and ADA-compliant restrooms.

Office Space Near I-64

Office Space Near I-64

O Fallon, IL

Contact for pricing

11,998 sqft 2.53 AC lot

High-end office space with excellent visibility and convenient location.

Retail Center Endcap Office Suite

Retail Center Endcap Office Suite

10234 Lincoln Trail, Fairview Heights, IL 62208

Contact for pricing

2,011 sqft

Endcap suite includes mostly open space, a rear private restroom, and multiple access points along the south wall.

Fairview Heights Office Suites Available

Fairview Heights Office Suites Available

141 Market Place, Fairview Heights, IL 62208

Contact for pricing

5,144 sqft

Class B office suites for lease near I-64.

Second-Floor Office Suite

Second-Floor Office Suite

1109 Hartman Ln, Shiloh, IL 62221

Contact for pricing

606 sqft

Second-floor Suite 201B offers an open L-shaped layout with high-end finishes in a well-maintained office complex.

Renovated Two-Story Office Building

Renovated Two-Story Office Building

1127 East B Street, Belleville, IL 62221

Contact for pricing

11,874 sqft 1.06 AC lot

Climate-controlled workspace includes private offices, meeting space, reception, restrooms, and a lunchroom.

Renovated Two-Story Office Building

Renovated Two-Story Office Building

1127 East B St, Belleville, IL 62220

Contact for pricing

11,874 sqft 1.06 AC lot

Climate-controlled workspace includes private offices, meeting space, and an employee parking area.

Office/Retail Suites for Lease

Office/Retail Suites for Lease

10304 Lincoln Trl, Fairview Heights, IL 62208

Contact for pricing

232 sqft

Two office and retail suites are scheduled for availability in late March and May 2026.

Medical Office Lease Space

Medical Office Lease Space

O Fallon, IL 62269

Contact for pricing

Office space is available for lease near HSHS and St. Elizabeth's Hospital in O'Fallon’s medical corridor.

Fairview Heights Retail/Office Suites

Fairview Heights Retail/Office Suites

4600-4660 N Illinois St, Fairview Heights, IL

Contact for pricing

1,400 sqft 5.40 AC lot

Office and retail suites available in established Fairview Heights center.

Professional Office Suite For Lease

Professional Office Suite For Lease

28 Bronze Pointe N, Swansea, IL

Contact for pricing

2,613 sqft 0.13 AC lot

Office suite available for lease in Swansea, Illinois.

Furnished Office Space in O'Fallon

Furnished Office Space in O'Fallon

620 Pierce Blvd, O Fallon, IL

Contact for pricing

14,140 sqft 0.33 AC lot

Class A office space available for lease in O'Fallon.

Open-Concept Office Unit

Open-Concept Office Unit

305-309 N Illinois St, Belleville, IL 62220

Contact for pricing

700 sqft

Office suite with private restroom and rear parking near IL-159.

Belleville Office Space for Lease

Belleville Office Space for Lease

7650 Magna Dr, Belleville, IL

Contact for pricing

13,144 sqft 13.93 AC lot

Professional office suites available with highway visibility and ample parking.

Class Office Building Suites

Class Office Building Suites

7650 Magna Dr, Belleville, IL 62223

Contact for pricing

6,500 sqft

Office suites spread across two levels, with shared amenities, a covered loading dock, and building signage with highway visibility.

St Clair County, IL Office Spaces Market Trends and Statistics

Explore Office Spaces leasing options in St Clair County, IL with 54 listings featured on our commercial real estate exchange. The current inventory includes 220,363 square feet of properties with an estimated lease value of $10.

Estimated lease rates for Office Spaces in St Clair County, IL average $10 SF/Yr.

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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