| Business | Phone |
| Columbia Management-Retail 10400 Little Patuxent Pkwy, Columbia 21044 | (410) 964-2020 |
| American Community Management 9160 Red Branch Rd, Columbia 21045 | (410) 997-7767 |
| Bentana Apartments Realty Mgmt 8716 Hayshed Ln, Columbia 21045 | (410) 730-8806 |
| C & L Management Svc 6562 Pennacook Ct, Columbia 21045 | (410) 290-7113 |
| Columbia Management Inc 10400 Little Patuxent Pkwy 210, Columbia 21044 | (410) 992-3600 |
| Corporate Realty Management 6950 Columbia Gateway Dr, Columbia 21046 | (410) 995-6699 |
| Crest Property Management 5525 Twin Knolls Rd # 326, Columbia 21045 | (410) 730-2800 |
| Dennemeyer & Co Inc 6990 Columbia Gateway Dr # 360, Columbia 21046 | (410) 872-0640 |
| Liberty Property Trust 9830 Patuxent Woods Dr, Columbia 21046 | (410) 381-2477 |
| Mc Shea Management 7164 Columbia Gateway Dr, Columbia 21046 | (410) 290-0400 |
| Metropolitan Associates Dev 6150 Foreland Garth, Columbia 21045 | (410) 730-2226 |
| Transwestern Commercial Svc 6700 Alexander Bell Dr # 350, Columbia 21046 | (443) 285-0770 |
| Vision Realty Management 8775 Cloudleap Ct, Columbia 21045 | (301) 596-4500 |