| Business | Phone |
| Ausherman Development Corp 7420 Hayward Rd, Frederick 21702 | (301) 620-4431 |
| Brodsky Group 5711 Industry Ln, Frederick 21704 | (301) 663-1993 |
| Cavalier Development Consltnts 8095 Hillmark Ct, Frederick 21704 | (301) 631-9477 |
| Central Maryland Development 6 N East St # 101, Frederick 21701 | (301) 663-6886 |
| Dillon Development Partners 5712 Industry Ln # F, Frederick 21704 | (301) 695-6955 |
| Millennium Development Group 41 E All Saints St # 100, Frederick 21701 | (301) 662-6660 |
| Venezia Properties Llc 103 S Carroll St, Frederick 21701 | (301) 695-7847 |