| Business | Phone |
| James Schaeffer & Schimming 2300 Barrington Rd 140, Schaumburg 60194 | (847) 885-3322 |
| Stereometrics 4641 Jade Ln, Schaumburg 60192 | (847) 202-1262 |
| Land Acquisitions Inc 2300 Barrington Rd, Schaumburg 60194 | (847) 781-8289 |
| W T Land Surveying Inc 2500 W Higgins Rd, Schaumburg 60195 | (847) 885-0374 |