> 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/companies-in/washington-dc/construction/ # Construction Companies in Washington, DC The bigger construction companies headquartered in Washington, DC, with what they do, their sizes and how to reach their people. By Enrich.chat Editorial. Updated October 22, 2026. **Short answer:** Among the construction companies counted in Washington, DC, the biggest by headcount range include Liuna, Fort Myer Construction and Miller & Long Dc. They are mostly very small: 68% have 50 or fewer employees. ## Which construction companies are in Washington, DC? Among the companies whose public profile lists Construction as their industry and Washington, DC as their headquarters, the biggest by headcount range include Liuna, Fort Myer Construction, Miller & Long Dc, Mgac and Electri International. Names link to a company profile where we have one. | Company | Employees | | --- | --- | | Liuna | 10,001+ | | Fort Myer Construction | 501 to 1,000 | | Miller & Long Dc | 501 to 1,000 | | Mgac | 201 to 500 | | Electri International | 201 to 500 | | Anchor Construction | 201 to 500 | | Magnolia Companies | 201 to 500 | | Pro-Air | 201 to 500 | | Bf Joy | 201 to 500 | | Dynamic Contracting | 201 to 500 | | Synergi | 51 to 200 | | Mcn Build | 51 to 200 | | Winmar Construction | 51 to 200 | | Landis Architects Builders | 51 to 200 | | Gcs-Sigal | 51 to 200 | | Corenic Construction | 51 to 200 | | C&c Complete Services | 51 to 200 | | Wcs Construction | 51 to 200 | | Smoot Construction Company Of Washington Dc | 51 to 200 | | Blackwood Of Dc | 51 to 200 | | Nawic Dc Chapter 67 | 51 to 200 | | Mccullough Construction, L.L.C | 51 to 200 | | Goldin & Stafford | 51 to 200 | | Precision Wall Tech | 51 to 200 | | Preferred Capitol Cleaning | 51 to 200 | 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. ## What do construction companies in Washington, DC do? Construction is a broad label. The most common NAICS codes among them are 236220 (26%), 236115 (13%) and 238220 (5%). **Figure: What construction companies in Washington do.** Bars for the share of counted construction companies with each code: 236220 26%, 236115 13%, 238220 5%. *Share of counted construction companies in Washington by their NAICS code.* [NAICS 236220](https://enrich.chat/naics/236220/)[NAICS 236115](https://enrich.chat/naics/236115/)[NAICS 238220](https://enrich.chat/naics/238220/) ## How big are they? 68% of the construction companies counted in Washington, DC 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 construction companies in Washington.** Seven columns for the share of counted construction companies in Washington in each employee range: 11 to 50 68%, 51 to 200 24%, 201 to 500 5%, 501 to 1,000 1%, 1,001 to 5,000 0%, 5,001 to 10,000 0%, 10,001+ 1%. *Share of counted construction companies in Washington in each employee range.* ## How old are they? Most were founded in the 2000s (35%), then the 2010s (23%). **Figure: When construction companies in Washington were founded.** Eight columns for the share of counted construction companies in Washington founded in each era: Before 1960 3%, 1960s 2%, 1970s 3%, 1980s 9%, 1990s 17%, 2000s 35%, 2010s 23%, 2020s 8%. *Share of counted construction companies in Washington by the era they were founded in, for the ones that list a founding year.* ## How construction companies compare - 30% were founded in 2010 or later, against 54% across other cities on this site. ## How do you reach the people at construction companies in Washington, DC? 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 construction companies in Washington, DC ``` ### 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 construction companies in Washington, DC, 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 Other industries in Washington, DC: [Nonprofit Organizations](https://enrich.chat/companies-in/washington-dc/non-profit-organizations/)[Consulting Firms](https://enrich.chat/companies-in/washington-dc/business-consulting-and-services/)[IT Services Companies](https://enrich.chat/companies-in/washington-dc/it-services-and-it-consulting/)[Real Estate Companies](https://enrich.chat/companies-in/washington-dc/real-estate/)[Software Companies](https://enrich.chat/companies-in/washington-dc/software-development/)[Hospitals and Health Care Organizations](https://enrich.chat/companies-in/washington-dc/hospitals-and-health-care/)[Law Firms](https://enrich.chat/companies-in/washington-dc/law-practice/)[Financial Services Companies](https://enrich.chat/companies-in/washington-dc/financial-services/)[Public Relations Firms](https://enrich.chat/companies-in/washington-dc/public-relations-and-communications-services/)[Advertising Agencies](https://enrich.chat/companies-in/washington-dc/advertising-services/)[Technology and Internet Companies](https://enrich.chat/companies-in/washington-dc/technology-information-and-internet/)[Legal Services Firms](https://enrich.chat/companies-in/washington-dc/legal-services/)[Education Organizations](https://enrich.chat/companies-in/washington-dc/education-administration-programs/)[Colleges and Universities](https://enrich.chat/companies-in/washington-dc/higher-education/)[Government Agencies](https://enrich.chat/companies-in/washington-dc/government-administration/)[Research Services Firms](https://enrich.chat/companies-in/washington-dc/research-services/)[Architecture Firms](https://enrich.chat/companies-in/washington-dc/architecture-and-planning/)[Environmental Services Companies](https://enrich.chat/companies-in/washington-dc/environmental-services/)[Training and Coaching Firms](https://enrich.chat/companies-in/washington-dc/professional-training-and-coaching/)[All of Washington, DC](https://enrich.chat/companies-in/washington-dc/) Construction Companies in other cities: [Houston, TX](https://enrich.chat/companies-in/houston-tx/construction/)[New York, NY](https://enrich.chat/companies-in/new-york-ny/construction/)[Phoenix, AZ](https://enrich.chat/companies-in/phoenix-az/construction/)[Dallas, TX](https://enrich.chat/companies-in/dallas-tx/construction/)[Austin, TX](https://enrich.chat/companies-in/austin-tx/construction/)[Miami, FL](https://enrich.chat/companies-in/miami-fl/construction/)[Los Angeles, CA](https://enrich.chat/companies-in/los-angeles-ca/construction/)[Denver, CO](https://enrich.chat/companies-in/denver-co/construction/)[Chicago, IL](https://enrich.chat/companies-in/chicago-il/construction/)[San Diego, CA](https://enrich.chat/companies-in/san-diego-ca/construction/) ## Frequently asked questions ### Which are the biggest construction companies in Washington, DC? Among those counted, they include Liuna, Fort Myer Construction, Miller & Long Dc, Mgac and Electri International, ranked by headcount range. ### How big are construction companies in Washington, DC? 68% of those counted 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. ### Which companies count as construction? Companies whose public profile lists Construction as their industry and whose headquarters are in Washington, DC. ## Try this prompt Find the people at construction companies in Washington, DC ```text Use www.enrich.chat to find the owners, operations and procurement leaders at construction companies in Washington, DC, with titles and verified work emails ``` ## Related - [Companies using a technology](https://enrich.chat/companies-using/) - [Nonprofit Organizations in Washington, DC](https://enrich.chat/companies-in/washington-dc/non-profit-organizations/) - [Consulting Firms in Washington, DC](https://enrich.chat/companies-in/washington-dc/business-consulting-and-services/) - [IT Services Companies in Washington, DC](https://enrich.chat/companies-in/washington-dc/it-services-and-it-consulting/) - [Real Estate Companies in Washington, DC](https://enrich.chat/companies-in/washington-dc/real-estate/) - [Construction Companies in Houston](https://enrich.chat/companies-in/houston-tx/construction/) - [Construction Companies in New York](https://enrich.chat/companies-in/new-york-ny/construction/) - [Construction Companies in Phoenix](https://enrich.chat/companies-in/phoenix-az/construction/) - [Construction Companies in Dallas](https://enrich.chat/companies-in/dallas-tx/construction/) - [Tech stack lookup](https://enrich.chat/tools/tech-stack-lookup/)