| Business | Phone |
| Argo Contractor Svc Inc 1915 Edmore Ave, Rowland Heights 91748 | (626) 581-4577 |
| Commercial Electric Systems 19136 1/2 San Jose Ave, Rowland Heights 91748 | (626) 839-7811 |
| Cook's Equipment Rowland Heights 91748 | (626) 965-4117 |
| Vanguard Electric 18456 La Guardia St, Rowland Heights 91748 | (626) 581-7706 |