| Business | Phone |
| Paul E Spruill & Assoc Inc Po Box 4111, Upper Marlboro 20775 | (301) 499-5150 |
| Real Property Research 9905 Rosaryville Rd, Upper Marlboro 20772 | (301) 868-7910 |
| Bas Real Estate Investments 14513 Main St, Upper Marlboro 20772 | (301) 952-8766 |
| Christopher & Assoc 7408 Gambier Dr, Upper Marlboro 20772 | (301) 868-0736 |
| County Appraisal Svc Inc 14624 Dunbarton Dr, Upper Marlboro 20772 | (301) 627-3422 |
| D L Kearney Real Estate Apprs 9929 Campus Way S, Upper Marlboro 20774 | (301) 350-1800 |