W.E. ONeil Construction
Construction · Chicago, Illinois
Products & Services
About W.E. ONeil Construction
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.
Its primary NAICS classification is 541330 (Engineering Services). W.E. ONeil Construction is one of 6,047 Construction companies listed in Illinois.
Business Contact Information
- Phone
- (773) 755-1611
- Fax
- (512) 371-7950
- Website
- www.weoneil.com
- www.linkedin.com/company/weoneil
- Address
- 1245 W Washington Blvd, Chicago, Illinois, 60607, United States
Industry & Classification
- Industry
- Construction
- Sector
- Construction
- Segment
- Industrial construction
NAICS Codes
- 541330Engineering Services
- 518210Computing Infrastructure Providers, Data Processing, Web Hosting, and Related Services
SIC Codes
- 8748Other Management Consulting Services
- 8741Office Administrative Services
Company Details
- Employees
- 1,000
W.E. ONeil Construction: frequently asked questions
What does W.E. ONeil Construction do?
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.
Where is W.E. ONeil Construction located?
W.E. ONeil Construction is located at 1245 W Washington Blvd, Chicago, Illinois, 60607, United States.
How many employees does W.E. ONeil Construction have?
W.E. ONeil Construction has about 1,000 employees.
What industry is W.E. ONeil Construction in?
W.E. ONeil Construction is in the Construction / Construction industry, and its primary NAICS code is 541330 (Engineering Services).
How can I contact W.E. ONeil Construction?
Its website is www.weoneil.com and its phone number is (773) 755-1611.
What companies are similar to W.E. ONeil Construction?
Other large construction companies in Illinois include Clayco Inc, Tecta America Corp, Enppi and Power Construction.
Largest construction companies in Illinois
Largest companies in Illinois
Largest construction companies
Manufacturing sales in Illinois, 2026
In Illinois, Factur's 2026 study counted 74 manufacturing quotes worth $11.8M and 14 purchase orders over 12 months: 19% of quotes became orders, against 21% nationally. See the Illinois data.
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