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Construction company directory

Construction Companies in Illinois

Our directory lists 273 construction companies in Illinois across 131 cities, built from OpenStreetMap office records and the ENR Top 400 Contractors list. Chicago has the most listings. Each listing shows only the facts on record.

Companies
273 companies
Cities
131 cities
Ranked contractors
10 ENR Top 400 contractors

Which cities in Illinois have the most construction companies?

Chicago has the most construction companies in Illinois, with 27 listings, followed by Naperville. Pick a city to see every company listed there.

All 131 cities in Illinois

Which construction companies are listed in Illinois?

These are the 30 most complete of the 273 construction companies listed in Illinois, with ranked contractors first.

Search all 273 companies in Illinois

Which large contractors are based in Illinois?

The Walsh Group is the highest-ranked contractor listed in Illinois, at No. 16 on the ENR Top 400 Contractors list for 2026.

  1. 16The Walsh GroupChicago
  2. 20ClaycoChicago
  3. 45Clune ConstructionChicago
  4. 51Construction Partners, Inc.McCook
  5. 77Pepper ConstructionChicago
  6. 81Power Construction Co. LLCChicago
  7. 95W.E. O'Neil Construction Co.Chicago
  8. 126The McShane Cos.Rosemont
  9. 162GraycorOakbrook Terrace
  10. 204SkenderChicago

What are the most common construction trades in Illinois?

The most listed trade in Illinois is hvac contractors, with 54 companies. A company can be listed under more than one trade.

How do I check a contractor's license in Illinois?

Search the Illinois Department of Financial and Professional Regulation by company name or license number before you hire. 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.

FAQ

Construction companies in Illinois: FAQs

How many construction companies are in Illinois?

Our directory lists 273 construction companies in Illinois, from OpenStreetMap office records and the ENR Top 400 Contractors list.

Which cities in Illinois have the most construction companies?

Chicago (27), Naperville (26), Champaign (14), Springfield (14) and Bloomington (7) have the most listings in Illinois.

How do I check a contractor's license in Illinois?

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 by company or license number before you hire.

Which large contractors are based in Illinois?

Ranked contractors listed in Illinois include The Walsh Group (No. 16), Clayco (No. 20), Clune Construction (No. 45) and Construction Partners, Inc. (No. 51) on the ENR Top 400 Contractors list for 2026.

What construction trades are most common in Illinois?

The trades with the most listings in Illinois are hvac contractors (54), plumbing contractors (39), roofing contractors (36) and glass and window contractors (31).

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Office locations © OpenStreetMap contributors, available under the Open Database License. Company rankings from the ENR Top 400 Contractors (2026).

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