| Business | Phone |
| Aes Clean Technologies Inc 7114 Geoffrey Way, Frederick 21704 | (301) 874-0974 |
| America's Cleaning Svc Co 1804 Whispering Meadow Ct, Frederick 21702 | (301) 682-7171 |
| Broom Buster's Cleaning 3028 Basford Rd, Frederick 21703 | (301) 874-5472 |
| Control Service Group 1301 W Patrick St, Frederick 21702 | (301) 644-2888 |
| Crawford Building Maintenance 5731 Bells Ln, Frederick 21704 | (301) 694-0931 |
| D & F Cleaning Svc Frederick 21701 | (301) 694-7313 |
| D H Visions 5801 Broad Branch Way, Frederick 21704 | (301) 694-3313 |
| Dinterman Janitorial 8016 Fieldstone Dr, Frederick 21702 | (301) 663-6767 |
| Fmi Svc Group 5906 Enterprise Ct, Frederick 21703 | (301) 698-0454 |
| J L's Cleaning Svc Frederick 21701 | (301) 694-3313 |
| Javy & Candy Cleaning Co 2043 William Franklin Dr, Frederick 21702 | (301) 631-2048 |
| Mid Maryland Cleaning Svc Inc 7803 Edgewood Church Rd # B, Frederick 21702 | (301) 473-9919 |
| R & S Cleaning & Maintenance 5816 Hildebrand Rd, Frederick 21704 | (301) 662-0804 |
| R O Mason Commercial Cleaning 2606 Warren Way, Frederick 21701 | (301) 694-8077 |
| Service Master 1517 W Patrick St # B8, Frederick 21702 | (301) 662-7664 |
| Shank Cleaning Svc 313 E 9th St, Frederick 21701 | (301) 662-3983 |