| Business | Phone |
| Automated Systems Inc 11 N Skokie Hwy # 115, Lake Bluff 60044 | (847) 735-8310 |
| Frauenhoffer Engineering Assoc 11 N Skokie Hwy 112, Lake Bluff 60044 | (847) 735-8812 |
| Lake County Land Survey 920 North Shore Dr, Lake Bluff 60044 | (847) 234-8909 |