| Business | Phone |
| 5 Star Construction Inc 3100 Dundee Rd # 705, Northbrook 60062 | (847) 559-0070 |
| A K Electric Northbrook 60062 | (847) 272-2881 |
| Geneva Electric 1 The Court Of Cobblestone, Northbrook 60062 | (847) 291-9559 |
| Geary Electric 3151 Commercial Ave, Northbrook 60062 | (847) 509-0540 |
| Brown Electric Inc 425 Huehl Rd, Northbrook 60062 | (847) 948-8130 |
| Brumer's Electric Co 2766 Wilshire Ln, Northbrook 60062 | (847) 480-0620 |
| Chatfield Electric Inc 3217 Doolittle Dr, Northbrook 60062 | (847) 509-1660 |
| Dexter Electric Co 3675 Woodhead Dr, Northbrook 60062 | (847) 498-0660 |
| Deerfield Electric Co 3680 Commercial Ave, Northbrook 60062 | (847) 272-6700 |
| Blazer Electric Co. 3611 Oak Ave, Northbrook 60062 | (847) 652-6550 |