| Business | Phone |
| Concord House Condominium 10850 Green Mountain Cir, Columbia 21044 | (410) 997-7650 |
| Condominium Venture Inc 6300 Woodside Ct # 10, Columbia 21046 | (301) 596-2600 |
| Partridge Court Maintenance 10716 Green Mountain Cir, Columbia 21044 | (410) 964-3046 |
| Treover Condominium Assoc 5913 Tamar Dr, Columbia 21045 | (410) 997-9497 |
| Watermark Place Condominiums 10001 Windstream Dr, Columbia 21044 | (410) 740-9339 |
| Whitney Condominium 10800 Warfield Pl, Columbia 21044 | (410) 730-2681 |