Living year-round in Sag Harbor, Jack Costaregni is based out of the Bridgehampton office of Saunders & Associates, the Hamptons' #1 locally owned and operated brokerage firm.

Energetic, reliable, and strategic, Jack brings a fresh perspective to Hamptons real estate while helping clients make confident, informed decisions. Prior to real estate, Jack studied finance at Tulane University and worked as an analyst at American Express, building a strong financial foundation that now informs his approach to the Hamptons market.
Jack understands that every transaction is different. Whether advising buyers, sellers, renters, or investors, he brings careful strategy, clear communication, and honest guidance to each step of the process. With firsthand exposure to property renovation, investment potential, and the balance between numbers and vision, Jack offers a practical, analytical perspective that helps clients make smart, confident decisions.

A resident of the Hamptons since 2014, Jack has developed a deep appreciation for the East End's lifestyle, beaches, communities, and year-round appeal. Outside of real estate, he enjoys golf, tennis, working out, movies, and spending time with his cat, Omer.