Real estate brokerage service provider Sotheby's International Realty Affiliates' Massachusetts-based Harborside Sotheby's International Realty affiliate merged with Sagan Realtors.

The new entity, Sagan Harborside Sotheby's International Realty, has roughly 80 independent sales associates, and the merger will expand the firm's coverage across Essex County, Mass.

Phyllis Sagan, former owner of Sagan Realtors, will serve as president of Sagan Harborside, while Shari Sagan McGuirk and Julie Sagan will become partners at the firm, along with Michael Cannuscio, Matt Dolan and Dick McKinley.

According to a release, the Sotheby's International Realty network now has 45 branded offices across Massachusetts.

Sotheby's International is a subsidiary of residential real estate service provider Realogy Holdings Corp.