Advon Real Estate's founder and broker, Genevieve Concannon, is pleased to announce the merging of Advon Real Estate to TTR Sotheby's International Realty as of June 1, 2019. Advon will become part of the 275-year-old brand at TTR Sotheby's known … [Read more...] about Advon Group Announced at TTR Sotheby’s International