| Business | Phone |
| Associated Engineers & Survey 102 N Main St, Bel Air 21014 | (410) 836-9207 |
| Bay State Land Svc 1 Vale Rd, Bel Air 21014 | (410) 879-4747 |
| Kls Consultants Inc 4401 Philadelphia Rd, Bel Air 21015 | (410) 734-0445 |
| Thompson & Mc Cord Assoc 402 N Hickory Ave, Bel Air 21014 | (410) 803-0696 |