| Business | Phone |
| Amec Intl Inc 999 Maple Ave, Frederick 21701 | (301) 668-1566 |
| Centex Construction Co 1654 Nalin Farm Pond Rd, Frederick 21702 | (301) 620-2229 |
| Copley & Williams Construction 810 Schreider St, Frederick 21702 | (301) 663-5001 |
| Dustin Enterprises 5115 Pegasus Ct, Frederick 21704 | (301) 662-9500 |
| Gallart Associates Inc 176 Thomas Johnson Dr # 202, Frederick 21702 | (301) 696-1501 |
| J R Mc Laughlin Assoc Inc 8309 Walter Martz Rd, Frederick 21702 | (301) 695-0289 |
| Politz Construction 6092 Edmont Dr, Frederick 21704 | (301) 620-2023 |
| Robert K Wormald Inc 2655 Brook Valley Rd, Frederick 21701 | (301) 631-0335 |
| Washington Homes Frederick 21701 | (240) 379-6412 |
| Waynesboro Construction Co 5900 Frederick Crossing Ln, Frederick 21704 | (301) 695-1247 |
| Worman's Mill Townhouse Sales 2638 Mill Race Rd, Frederick 21701 | (301) 662-8301 |