Piatt Sotheby's INTERNATIONAL REALTY Unrivaled. Unmatched. Residential Real Estate. 412.939.7000 519 BROAD STREET, SEWICKLEY, PA 15143 412.939.7000 (0) | PIATTSIR.COM Piatt Sotheby's INTERNATIONAL REALTY Unrivaled. Unmatched. Residential Real Estate. 412.939.7000 519 BROAD STREET, SEWICKLEY, PA 15143 412.939.7000 (0) | PIATTSIR.COM