| Business | Phone |
| Maryland Control Systems 3114 Hammonds Ferry Rd, Halethorpe 21227 | (410) 242-8563 |
| R A Norman Heating & Air Cond Halethorpe 21227 | (410) 737-4850 |
| Catons Plumbing Heating 1667 Knecht Ave # J, Halethorpe 21227 | (410) 730-0444 |
| Dynastics 1917 Lansdowne Rd, Halethorpe 21227 | (410) 247-6750 |
| Kmb Hvac Svc Halethorpe 21227 | (410) 636-0453 |