Construction Companies in Pennsylvania: 119 Verified Firms
Secwyn has verified 119 construction companies based in Pennsylvania. The largest groups are Commercial and Institutional Building Construction (23); Plumbing, Heating, and Air-Conditioning Contractors (12); and Electrical Contractors and Other Wiring Installation Contractors (9). By headcount, 90% have 51–200 employees, 9% have 201–500 employees, and 1% fall in other size bands. Philadelphia has the most (8), followed by Pittsburgh (7) and Lancaster (4).
Company size
- 51–200 employees107 · 90%
- 201–500 employees11 · 9%
- 501–1,000 employees1 · 1%
Top cities
- Philadelphia8 · 7%
- Pittsburgh7 · 6%
- Lancaster4 · 3%
- Allentown3 · 3%
- Bensalem3 · 3%
Cities with fewer than 3 companies are not listed.
Largest sub-industries
| Sub-industry | NAICS | Companies |
|---|---|---|
| Commercial and Institutional Building Construction | 236220 | 23 |
| Plumbing, Heating, and Air-Conditioning Contractors | 238220 | 12 |
| Electrical Contractors and Other Wiring Installation Contractors | 238210 | 9 |
| Highway, Street, and Bridge Construction | 237310 | 9 |
| Roofing Contractors | 238160 | 8 |
| All Other Specialty Trade Contractors | 238990 | 7 |
| Poured Concrete Foundation and Structure Contractors | 238110 | 7 |
| Other Heavy and Civil Engineering Construction | 237990 | 6 |
A sample of these companies
A few of the 119 construction companies in Pennsylvania. Names, websites and contacts are shown after you sign up.
Company #1 · name shown after sign-up
Electrical Contractors and Other Wiring Installation Contractors · 51–200 employees
Company #2 · name shown after sign-up
Other Heavy and Civil Engineering Construction · 51–200 employees
Company #3 · name shown after sign-up
Plumbing, Heating, and Air-Conditioning Contractors · 51–200 employees
Company #4 · name shown after sign-up
All Other Specialty Trade Contractors · 51–200 employees · Philadelphia
Company #5 · name shown after sign-up
Commercial and Institutional Building Construction · 51–200 employees
Company #6 · name shown after sign-up
Site Preparation Contractors · 51–200 employees
Find the Pennsylvania 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.