The Stone Group Srl with registered offices in Via Salaria 150 Monterotondo Rome airport ( CAP00015 ) Accredited to the Real Estate Exchange of Rome has since 2006 of a Quality Management System Certificate ISO 9001/2008 - Certificate Rina 23790 / 06 / S . Headquartered in Viale Delle Terme di Caracalla No. 69/71 (Corner Alley Antoniniano ) Rome ( CAP00153 ) Structure of the Public Chamber of Commerce managed by Tecnoborsa SCPA to ensure uniformity and spread throughout the national operational methodologies unique , representing the broader market supply through a computer platform responsible for managing a database of real estate only implemented by accredited and regulated by special regulations . We operate throughout the country & International with the collaboration of our partners , identifying the services rendered by their surnames Family Stone & Della Valle , then through the brands La Pietra Promotions Group Real Estate & Properties Exclusive Della Valle , in the segments , residential , commercial , tourist , luxury real estate, in complementary services , with the guarantee of Walter Stone administrator with twenty years experience in the industry, the Chamber of Commerce Member of Rome as Agent of Business Negotiation , On the Register Experts and in estimation and evaluation of properties , Member Register of Technical Consultants at the Court of Tivoli civil sector real estate section . Detector of the official list of Borsa Immobiliare of Rome introduced by the Chamber of Commerce of Rome since 1989. Now we got to today where he continues his profession with passion by providing to your workgroup all his experience to offer users all credentials obtained in the course of our mediation , we are very attentive to the quality of the transactions, and especially to the consolidation of the relationship with customers in order to become your point of reference .