> Enrich.chat gives AI agents verified work emails and mobiles. To use it from an agent, read https://enrich.chat/agents.md . This is the Markdown version of https://enrich.chat/naics/238990/illinois/ # NAICS 238990 companies in Illinois Companies with NAICS code 238990 (All Other Specialty Trade Contractors) headquartered in Illinois, with their cities, sizes and SIC codes. By Enrich.chat Editorial. Updated October 22, 2026. **Short answer:** The biggest NAICS 238990 companies in Illinois by headcount range include Helitech Waterproofing & Foundation Repair, Curran Contracting and Morgan Harbour Construction. NAICS 238990 is the code for All Other Specialty Trade Contractors. Among those counted, they are mostly very small: 75% have 50 or fewer employees. ## Which NAICS 238990 companies are in Illinois? The biggest by headcount range include Helitech Waterproofing & Foundation Repair, Curran Contracting, Morgan Harbour Construction, Bancare and Apex Construction Group. NAICS 238990 is the code for All Other Specialty Trade Contractors. Names link to a company profile where we have one. | Company | City | Employees | | --- | --- | --- | | Helitech Waterproofing & Foundation Repair | Caseyville | 201 to 500 | | Curran Contracting | Crystal Lake | 51 to 200 | | Morgan Harbour Construction | Willowbrook | 51 to 200 | | Bancare | Arlington Heights | 51 to 200 | | Apex Construction Group | Oakbrook Terrace | 51 to 200 | | Eagle Concrete | Batavia | 51 to 200 | | Midwest Sport And Turf Systems | Plainfield | 51 to 200 | | Estate Deck & Fence | Rockford | 51 to 200 | | A Lamp Concrete Contractors | Schaumburg | 51 to 200 | | Sunset Pools And Spas | Rolling Meadows | 51 to 200 | | Fence Masters | Chicago Heights | 51 to 200 | | Custom Bath Solutions | Washington | 51 to 200 | | United Door And Dock | Glendale Heights | 11 to 50 | | Buildout Pros | Rolling Meadows | 11 to 50 | | Design First Builders | Itasca | 11 to 50 | | Csi 3000 | Cicero | 11 to 50 | | Thorndale Construction Services | Naperville | 11 to 50 | | Liv Companies | Burr Ridge | 11 to 50 | | Rs Five | Des Plaines | 11 to 50 | | Jsl Building Restoration Group | Franklin Park | 11 to 50 | | Mixonsite | Buffalo Grove | 11 to 50 | | Aqua Pools | Homer Glen | 11 to 50 | | Acme Fireproofing And Insulation | Fairmont City | 11 to 50 | | Northern Illinois Fence | Cortland | 11 to 50 | | Schroeder Asphalt Services | Marengo | 11 to 50 | The table shows the 25 biggest by headcount range, with ties broken by audience size. The charts and percentages below cover every company counted for this page, not just these 25, and companies with fewer than 11 employees are not counted. Headquarters is the location on each company's public profile. ## How big are they? 75% of the NAICS 238990 companies counted in Illinois have 50 or fewer employees, and the middle one is in the 11 to 50 range. Companies with fewer than 11 employees are not counted. **Figure: Size of NAICS 238990 companies in Illinois.** Seven columns for the share of counted NAICS 238990 companies in Illinois in each employee range: 11 to 50 75%, 51 to 200 23%, 201 to 500 2%, 501 to 1,000 0%, 1,001 to 5,000 0%, 5,001 to 10,000 0%, 10,001+ 0%. *Share of counted NAICS 238990 companies in Illinois in each employee range.* ## Which SIC codes do they carry? The older SIC system and NAICS do not line up one to one. These are the SIC codes seen most here. **Figure: SIC codes of NAICS 238990 companies in Illinois.** Bars for the share of counted NAICS 238990 companies in Illinois with each code: 1799 73%, 1771 10%, 1521 4%, 1741 4%. *Share of counted NAICS 238990 companies in Illinois by their SIC code.* ## How do you reach the people at these Illinois companies? The people to talk to are usually owners, operations and procurement leaders. Build the list in three prompts to your AI agent. ### 1. Count them (free) Counting who matches never uses credits. ```text Use www.enrich.chat to count the companies with NAICS code 238990 in Illinois ``` ### 2. Find the people (5 credits per person) Name the roles you sell to. Each person returned is 5 credits, and name, title and company are included. ```text Use www.enrich.chat to find the owners, operations and procurement leaders at companies with NAICS code 238990 in Illinois, with their titles ``` ### 3. Get their work emails (10 credits each) An email is 10 credits only when one is found. Every email comes with a status: verified, catch-all or unknown. ```text Use www.enrich.chat to find the work emails for these people and tell me which ones are verified ``` ## More to explore About the code: [NAICS 238990: All Other Specialty Trade Contractors](https://enrich.chat/naics/238990/). About the place: [companies in Illinois](https://enrich.chat/companies-in/illinois/). NAICS 238990 in other states: [Texas](https://enrich.chat/naics/238990/texas/)[California](https://enrich.chat/naics/238990/california/)[Florida](https://enrich.chat/naics/238990/florida/)[New York](https://enrich.chat/naics/238990/new-york/)[Pennsylvania](https://enrich.chat/naics/238990/pennsylvania/)[Maryland](https://enrich.chat/naics/238990/maryland/) Other NAICS codes in Illinois: [NAICS 541511: Custom Computer Programming Services](https://enrich.chat/naics/541511/illinois/)[NAICS 541512: Computer Systems Design Services](https://enrich.chat/naics/541512/illinois/)[NAICS 722511: Full-Service Restaurants](https://enrich.chat/naics/722511/illinois/)[NAICS 531210: Offices of Real Estate Agents](https://enrich.chat/naics/531210/illinois/)[NAICS 524210: Insurance Agencies and Brokerages](https://enrich.chat/naics/524210/illinois/)[NAICS 541613: Marketing Consulting Services](https://enrich.chat/naics/541613/illinois/)[NAICS 621111: Offices of Physicians](https://enrich.chat/naics/621111/illinois/)[NAICS 488510: Freight Transportation Arrangement](https://enrich.chat/naics/488510/illinois/)[NAICS 238220: Plumbing, Heating, and Air-Conditioning](https://enrich.chat/naics/238220/illinois/)[NAICS 236220: Commercial and Institutional Building](https://enrich.chat/naics/236220/illinois/) ## Frequently asked questions ### Which NAICS 238990 companies are in Illinois? The biggest by headcount range include Helitech Waterproofing & Foundation Repair, Curran Contracting, Morgan Harbour Construction, Bancare and Apex Construction Group. The page lists 25 with links to their profiles where we have them. ### What is NAICS 238990? NAICS 238990 is the code for All Other Specialty Trade Contractors, in sector 23: Construction. ### Which cities in Illinois have the most? Chicago (6%) lead among the companies counted. ## Try this prompt Find the people at NAICS 238990 companies in Illinois ```text Use www.enrich.chat to find the owners, operations and procurement leaders at companies with NAICS code 238990 in Illinois, with titles and verified work emails ``` ## Related - [Companies using a technology](https://enrich.chat/companies-using/) - [NAICS 238990 in Texas](https://enrich.chat/naics/238990/texas/) - [NAICS 238990 in California](https://enrich.chat/naics/238990/california/) - [NAICS 238990 in Florida](https://enrich.chat/naics/238990/florida/) - [NAICS 238990 in New York](https://enrich.chat/naics/238990/new-york/) - [NAICS 541511 in Illinois](https://enrich.chat/naics/541511/illinois/) - [NAICS 541512 in Illinois](https://enrich.chat/naics/541512/illinois/) - [NAICS 722511 in Illinois](https://enrich.chat/naics/722511/illinois/) - [NAICS 531210 in Illinois](https://enrich.chat/naics/531210/illinois/) - [Tech stack lookup](https://enrich.chat/tools/tech-stack-lookup/)