Construction Companies in Missouri: 55 Verified Firms
Secwyn has verified 55 construction companies based in Missouri. The largest groups are Plumbing, Heating, and Air-Conditioning Contractors (11); Commercial and Institutional Building Construction (7); and Electrical Contractors and Other Wiring Installation Contractors (7). By headcount, 84% have 51–200 employees, 11% have 201–500 employees, and 5% fall in other size bands. St. Louis has the most (10), followed by Kansas City (7) and Fenton (3).
Company size
- 51–200 employees46 · 84%
- 201–500 employees6 · 11%
- 501–1,000 employees3 · 5%
Top cities
- St. Louis10 · 18%
- Kansas City7 · 13%
- Fenton3 · 5%
- Lee's Summit3 · 5%
Cities with fewer than 3 companies are not listed.
Largest sub-industries
| Sub-industry | NAICS | Companies |
|---|---|---|
| Plumbing, Heating, and Air-Conditioning Contractors | 238220 | 11 |
| Commercial and Institutional Building Construction | 236220 | 7 |
| Electrical Contractors and Other Wiring Installation Contractors | 238210 | 7 |
| Poured Concrete Foundation and Structure Contractors | 238110 | 6 |
| Site Preparation Contractors | 238910 | 5 |
| Roofing Contractors | 238160 | 4 |
| All Other Specialty Trade Contractors | 238990 | 3 |
| Finish Carpentry Contractors | 238350 | 2 |
A sample of these companies
A few of the 55 construction companies in Missouri. Names, websites and contacts are shown after you sign up.
Company #1 · name shown after sign-up
Poured Concrete Foundation and Structure Contractors · 501–1,000 employees · St. Louis
Company #2 · name shown after sign-up
Electrical Contractors and Other Wiring Installation Contractors · 51–200 employees
Company #3 · name shown after sign-up
Painting and Wall Covering Contractors · 51–200 employees
Company #4 · name shown after sign-up
Roofing Contractors · 201–500 employees · Lee's Summit
Company #5 · name shown after sign-up
Plumbing, Heating, and Air-Conditioning Contractors · 51–200 employees · St. Louis
Company #6 · name shown after sign-up
Site Preparation Contractors · 51–200 employees
Find the Missouri construction companies that 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.