| Business | Phone |
| Karellas Construction 410 Oldham St, Baltimore 21224 | (410) 342-4587 |
| Marine Technologies Inc 3437 9th St, Baltimore 21225 | (410) 355-2000 |
| P B Construction Svc 100 S Charles St, Baltimore 21201 | (410) 385-4176 |
| Technology Construction Inc 6606 Chippewa Dr, Baltimore 21209 | (410) 486-5520 |