Construction Companies in Washington: 90 Verified Firms
Secwyn has verified 90 construction companies based in Washington. The largest groups are Plumbing, Heating, and Air-Conditioning Contractors (22); Electrical Contractors and Other Wiring Installation Contractors (11); and Commercial and Institutional Building Construction (10). By headcount, 79% have 51–200 employees, 18% have 201–500 employees, and 3% fall in other size bands. Seattle has the most (13), followed by Everett (5) and Kent (5).
Company size
- 51–200 employees71 · 79%
- 201–500 employees16 · 18%
- 501–1,000 employees3 · 3%
Top cities
- Seattle13 · 14%
- Everett5 · 6%
- Kent5 · 6%
- Lynnwood4 · 4%
- Tacoma4 · 4%
- Tukwila4 · 4%
- Bellevue3 · 3%
- Bothell3 · 3%
- Puyallup3 · 3%
- Richland3 · 3%
Cities with fewer than 3 companies are not listed.
Largest sub-industries
| Sub-industry | NAICS | Companies |
|---|---|---|
| Plumbing, Heating, and Air-Conditioning Contractors | 238220 | 22 |
| Electrical Contractors and Other Wiring Installation Contractors | 238210 | 11 |
| Commercial and Institutional Building Construction | 236220 | 10 |
| Other Heavy and Civil Engineering Construction | 237990 | 8 |
| Roofing Contractors | 238160 | 5 |
| Painting and Wall Covering Contractors | 238320 | 4 |
| Highway, Street, and Bridge Construction | 237310 | 3 |
| New Single-Family Housing Construction (except For-Sale Builders) | 236115 | 3 |
A sample of these companies
A few of the 90 construction companies in Washington. Names, websites and contacts are shown after you sign up.
Company #1 · name shown after sign-up
Commercial and Institutional Building Construction · 51–200 employees
Company #2 · name shown after sign-up
Plumbing, Heating, and Air-Conditioning Contractors · 51–200 employees · Everett
Company #3 · name shown after sign-up
Flooring Contractors · 201–500 employees
Company #4 · name shown after sign-up
New Single-Family Housing Construction (except For-Sale Builders) · 201–500 employees · Seattle
Company #5 · name shown after sign-up
Siding Contractors · 201–500 employees · Tukwila
Company #6 · name shown after sign-up
Electrical Contractors and Other Wiring Installation Contractors · 51–200 employees · Tacoma
Find the Washington 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.