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No. 95 · ENR Top 400 Contractors 2026

W.E. O'Neil Construction Co.

W.E. O'Neil Construction Co. is ranked No. 95 on the ENR Top 400 Contractors list for 2026, and is listed here in Chicago, Illinois.

Who is W.E. O'Neil Construction Co.?

On the ENR Top 400 Contractors list for 2026, published by Engineering News-Record, it ranks No. 95. According to its website, it was founded in 1925.

Its website is weoneil.com.

W.E. O'Neil Construction Co. is one of 27 construction companies we list in Chicago. Before you hire any contractor in Illinois, check the license with the Illinois Department of Financial and Professional Regulation.

What does W.E. O'Neil Construction Co. say about its work?

W.E. O'Neil Construction is a 100% employee-owned general contractor. Building great relationships since 1925. Locations in AZ, CA, CO, IL, TN, and TX.

In the company's own words, from weoneil.com, read October 2026.

Where is W.E. O'Neil Construction Co. located?

W.E. O'Neil Construction Co. is listed in Chicago, IL. Its street address is not on record yet.

How big is W.E. O'Neil Construction Co.?

W.E. O'Neil Construction Co. ranks No. 95 on the ENR Top 400 Contractors list for 2026. Engineering News-Record ranks the largest U.S. contractors by construction revenue.

Source: ENR Top 400 Contractors (2026), Engineering News-Record

How do I check W.E. O'Neil Construction Co.'s contractor license?

Search the Illinois Department of Financial and Professional Regulation for W.E. O'Neil Construction Co. before you hire. We do not hold license records for individual companies. Illinois licenses selected trades, such as roofing, at the state level. General contractor licensing is handled by cities and counties.

Check a license in Illinois

Licensing rules checked October 2026. Requirements change, so confirm on the state site.

What other construction companies are in Chicago?

We list 27 construction companies in Chicago. Here are 8 more.

All construction companies in Chicago
FAQ

W.E. O'Neil Construction Co.: FAQs

Where is W.E. O'Neil Construction Co. located?

W.E. O'Neil Construction Co. is listed in Chicago, Illinois. Its street address is not on record yet.

What does W.E. O'Neil Construction Co. say about its work?

On weoneil.com, W.E. O'Neil Construction Co. describes itself like this: "W.E. O'Neil Construction is a 100% employee-owned general contractor. Building great relationships since 1925. Locations in AZ, CA, CO, IL, TN, and TX."

How do I contact W.E. O'Neil Construction Co.?

Visit weoneil.com.

How big is W.E. O'Neil Construction Co.?

W.E. O'Neil Construction Co. ranks No. 95 on the ENR Top 400 Contractors list for 2026. Engineering News-Record ranks the largest U.S. contractors by construction revenue.

Is W.E. O'Neil Construction Co. licensed?

We do not hold license records for individual companies. Illinois licenses selected trades, such as roofing, at the state level. General contractor licensing is handled by cities and counties. Search the Illinois Department of Financial and Professional Regulation to check a contractor before you hire.

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