| Business | Phone |
| Bozo Electric Po Box 1221, Union City 94587 | (510) 783-9888 |
| C & R Electronics Union City 94587 | (510) 494-9288 |
| Charles Reynolds Electric 356 Whipple Rd, Union City 94587 | (510) 487-4650 |
| D 1 Electric 30656 Watkins Ct, Union City 94587 | (510) 489-9774 |
| E & O Construction 988 D St, Union City 94587 | (510) 783-3655 |
| Electric Express Union City 94587 | (510) 487-4680 |
| National Electric Co 2837 Whipple Rd # B, Union City 94587 | (510) 357-7100 |
| Post Electric Co 32224 Almaden Blvd, Union City 94587 | (510) 487-2929 |
| Ramirez's Electric 32437 Jean Dr, Union City 94587 | (510) 471-5933 |
| Rocha Electrical & Svc 2313 Royal Ann Dr, Union City 94587 | (510) 475-1123 |