Construction Companies by State: 3,301 Verified US Firms
Secwyn has verified 3,301 construction companies across 50 states. California (345), Texas (324), and Florida (234) have the most. The largest groups nationwide are Plumbing, Heating, and Air-Conditioning Contractors (503); Commercial and Institutional Building Construction (452); and Electrical Contractors and Other Wiring Installation Contractors (422). By headcount, 82% have 51–200 employees, 15% have 201–500 employees, and 4% fall in other size bands. The 23 states below hold 2,786 of them; each has its own page.
Construction companies by state
| State | Verified companies | Share of US total |
|---|---|---|
| Construction in California | 345 | 10% |
| Construction in Texas | 324 | 10% |
| Construction in Florida | 234 | 7% |
| Construction in Ohio | 157 | 5% |
| Construction in New York | 150 | 5% |
| Construction in Illinois | 129 | 4% |
| Construction in Pennsylvania | 119 | 4% |
| Construction in Georgia | 117 | 4% |
| Construction in Michigan | 113 | 3% |
| Construction in North Carolina | 101 | 3% |
| Construction in Colorado | 94 | 3% |
| Construction in Arizona | 93 | 3% |
| Construction in Massachusetts | 92 | 3% |
| Construction in Washington | 90 | 3% |
| Construction in Virginia | 84 | 3% |
| Construction in Maryland | 82 | 2% |
| Construction in New Jersey | 76 | 2% |
| Construction in Wisconsin | 74 | 2% |
| Construction in Indiana | 69 | 2% |
| Construction in Tennessee | 67 | 2% |
| Construction in Minnesota | 65 | 2% |
| Construction in Utah | 56 | 2% |
| Construction in Missouri | 55 | 2% |
515 more companies are spread across other states. A state gets its own page once it has enough verified companies.
Largest sub-industries
- Plumbing, Heating, and Air-Conditioning Contractors503 · 15%
- Commercial and Institutional Building Construction452 · 14%
- Electrical Contractors and Other Wiring Installation Contractors422 · 13%
- Roofing Contractors322 · 10%
- Site Preparation Contractors203 · 6%
- Highway, Street, and Bridge Construction191 · 6%
- Poured Concrete Foundation and Structure Contractors168 · 5%
- Other Heavy and Civil Engineering Construction124 · 4%
Company size
- 51–200 employees2,697 · 82%
- 201–500 employees482 · 15%
- 501–1,000 employees122 · 4%
See which construction companies fit what you sell
Describe what you sell and Secwyn shows the companies most likely to buy it, with the reasons for each match. Sign up free and your first 3 company reveals are on us: name, website, description with its source, contact channels and the roles to contact.
How Secwyn verifies these companies
- Every company description is a sentence visible on the company's own website. Inside the product, each one links to its source page.
- Each company has a NAICS industry code, the US government standard for classifying businesses.
- All companies are based in the United States. Location and size come from public sources, including company filings and People Data Labs.
Data updated October 6, 2026.