| # | Company name | Role | # of projects |
|---|---|---|---|
| 1 | San Joaquin Valley Express | Client | 1 |
| 2 | San Miguel Meats | Client | 1 |
| 3 | Schoolland Construction | General contractor | 1 |
| 4 | SCM Construction Management Services | Construction management | 0 |
| 5 | Scott Wallace | Client | 1 |
| 6 | Shimon Amadin | Client | 1 |
| 7 | Showerman & Stone | Structural engineering | 21 |
| 8 | Simile Construction Service | General contractor | 1 |
| 9 | SKW & Associates | Architect | 0 |
| 10 | Sorensen Construction Inc | General contractor | 11 |
| 11 | Stanislaus County Office of Education | Client | 1 |
| 12 | Stanislaus Elementary Unified School District | Client | 0 |
| 13 | Stanislaus Farm Supply Co | Client | 1 |
| 14 | Stanislaus Plumbing | Client | 3 |
| 15 | Stanislaus Roofing | Roof installation | 1 |
| 16 | State Roofing | Roof installation | 0 |
| 17 | Steelco Builders Incorporated | General contractor | 4 |
| 18 | Steelco Construction | General contractor | 1 |
| 19 | Stone Cheney Construction | General contractor | 1 |
| 20 | Sutco Construction | Client | 1 |