Vinson Real Estate Services, LLC We're the leading Washington DC appraisal firm specializing in property appraisals for Divorce, Bankruptcy, Tax Appeals, Probate & Estate, Pre-Listings, FSBO's and more. We specialize in single family homes of any type, condos and multi 2-4 unit. Washington DC appraiser specializing in Maryland, Virginia, Washington, D.C. Metro and surrounding areas.