Howard Hanna Real Estate Services is Pennsylvania, Ohio, West Virginia and New York's largest real estate company. They can handle every aspect of any real estate transaction from appraisal to closing "IN-HOUSE". Appraisal The oldest of Howard Hanna's ancillary companies, Hanna Appraisal Services has been in operation since 1968. Fully computerized, Hanna Appraisal Services employs a full-time staff of experienced, certified professionals. To serve valuation needs more efficiently, the company has created one of the largest data bases in Pittsburgh. Appraisal Services also includes residential and industrial valuations.