| Business | Phone |
| Total Design Co Inc 3008 Grange Hall Rd, Holly 48442 | (248) 634-7871 |
| Construction Testing Svc 4019 Baldwin Rd, Holly 48442 | (810) 603-0766 |
| Receptec 4360 Baldwin Rd, Holly 48442 | (810) 695-9810 |
| Genpe 1445 Ranch Rd, Holly 48442 | (248) 634-6313 |