> 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/236220/colorado/ # NAICS 236220 companies in Colorado Companies with NAICS code 236220 (Commercial and Institutional Building Construction) headquartered in Colorado, with their cities, sizes and SIC codes. By Enrich.chat Editorial. Updated October 22, 2026. **Short answer:** The biggest NAICS 236220 companies in Colorado by headcount range include Hensel Phelps, Catamount Constructors and Haselden Construction. NAICS 236220 is the code for Commercial and Institutional Building Construction. Among those counted, they are mostly very small: 57% have 50 or fewer employees. ## Which NAICS 236220 companies are in Colorado? The biggest by headcount range include Hensel Phelps, Catamount Constructors, Haselden Construction, Mark Young Construction and Shaw Construction. NAICS 236220 is the code for Commercial and Institutional Building Construction. Names link to a company profile where we have one. | Company | City | Employees | | --- | --- | --- | | Hensel Phelps | Greeley | 5,001 to 10,000 | | Catamount Constructors | Lakewood | 201 to 500 | | Haselden Construction | Centennial | 201 to 500 | | Mark Young Construction | Frederick | 201 to 500 | | Shaw Construction | Denver | 51 to 200 | | Brinkman Construction | Fort Collins | 51 to 200 | | Gilmore Construction | Denver | 51 to 200 | | Howell Construction | Denver | 51 to 200 | | Roche Constructors | Greeley | 51 to 200 | | Nunn Construction | Colorado Springs | 51 to 200 | | Dohn Construction | Fort Collins | 51 to 200 | | Waner Construction | Highlands Ranch | 51 to 200 | | Hpm | Englewood | 51 to 200 | | Melton Design Build | Boulder | 51 to 200 | | Provident Construction | Centennial | 51 to 200 | | Confluence Companies | Golden | 51 to 200 | | Velocity Constructors | Englewood | 51 to 200 | | Murray & Stafford | Denver | 51 to 200 | | Pyramid Construction | Colorado Springs | 51 to 200 | | Diesslin Structures | Salida | 51 to 200 | | Western Summit Constructors | Englewood | 51 to 200 | | Art C. Klein Construction | Colorado Springs | 51 to 200 | | Alliance Construction Solutions | Denver | 11 to 50 | | Alcorn Construction | Lakewood | 11 to 50 | | Snyder Building Construction | Englewood | 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. ## Which cities in Colorado? Within Colorado, Colorado Springs (14%), Denver (14%) and Englewood (12%) are the most common headquarters. **Figure: Cities of NAICS 236220 companies in Colorado.** Bars for the share of counted NAICS 236220 companies in Colorado headquartered in each city: Colorado Springs 14%, Denver 14%, Englewood 12%, Centennial 10%, Boulder 6%, Fort Collins 6%. *Share of counted NAICS 236220 companies in Colorado by headquarters city.* ## How big are they? 57% of the NAICS 236220 companies counted in Colorado 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 236220 companies in Colorado.** Seven columns for the share of counted NAICS 236220 companies in Colorado in each employee range: 11 to 50 57%, 51 to 200 35%, 201 to 500 6%, 501 to 1,000 0%, 1,001 to 5,000 0%, 5,001 to 10,000 2%, 10,001+ 0%. *Share of counted NAICS 236220 companies in Colorado in each employee range.* ## How do you reach the people at these Colorado 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 236220 in Colorado ``` ### 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 236220 in Colorado, 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 236220: Commercial and Institutional Building Construction](https://enrich.chat/naics/236220/). About the place: [companies in Colorado](https://enrich.chat/companies-in/colorado/). NAICS 236220 in other states: [California](https://enrich.chat/naics/236220/california/)[Texas](https://enrich.chat/naics/236220/texas/)[Florida](https://enrich.chat/naics/236220/florida/)[New York](https://enrich.chat/naics/236220/new-york/)[Pennsylvania](https://enrich.chat/naics/236220/pennsylvania/)[Washington](https://enrich.chat/naics/236220/washington/)[North Carolina](https://enrich.chat/naics/236220/north-carolina/)[Virginia](https://enrich.chat/naics/236220/virginia/)[Illinois](https://enrich.chat/naics/236220/illinois/)[Georgia](https://enrich.chat/naics/236220/georgia/) Other NAICS codes in Colorado: [NAICS 541511: Custom Computer Programming Services](https://enrich.chat/naics/541511/colorado/)[NAICS 722511: Full-Service Restaurants](https://enrich.chat/naics/722511/colorado/)[NAICS 541613: Marketing Consulting Services](https://enrich.chat/naics/541613/colorado/)[NAICS 621999: All Other Miscellaneous Ambulatory](https://enrich.chat/naics/621999/colorado/)[NAICS 238210: Electrical Contractors and Other Wiring](https://enrich.chat/naics/238210/colorado/)[NAICS 236115: New Single-Family Housing Construction](https://enrich.chat/naics/236115/colorado/) ## Frequently asked questions ### Which NAICS 236220 companies are in Colorado? The biggest by headcount range include Hensel Phelps, Catamount Constructors, Haselden Construction, Mark Young Construction and Shaw Construction. The page lists 25 with links to their profiles where we have them. ### What is NAICS 236220? NAICS 236220 is the code for Commercial and Institutional Building Construction, in sector 23: Construction. ### Which cities in Colorado have the most? Colorado Springs (14%), Denver (14%) and Englewood (12%) lead among the companies counted. ## Try this prompt Find the people at NAICS 236220 companies in Colorado ```text Use www.enrich.chat to find the owners, operations and procurement leaders at companies with NAICS code 236220 in Colorado, with titles and verified work emails ``` ## Related - [Companies using a technology](https://enrich.chat/companies-using/) - [NAICS 236220 in California](https://enrich.chat/naics/236220/california/) - [NAICS 236220 in Texas](https://enrich.chat/naics/236220/texas/) - [NAICS 236220 in Florida](https://enrich.chat/naics/236220/florida/) - [NAICS 236220 in New York](https://enrich.chat/naics/236220/new-york/) - [NAICS 541511 in Colorado](https://enrich.chat/naics/541511/colorado/) - [NAICS 722511 in Colorado](https://enrich.chat/naics/722511/colorado/) - [NAICS 541613 in Colorado](https://enrich.chat/naics/541613/colorado/) - [NAICS 621999 in Colorado](https://enrich.chat/naics/621999/colorado/) - [Tech stack lookup](https://enrich.chat/tools/tech-stack-lookup/)