Nancy Costello brings more than 20 years of Hamptons real estate experience and deep roots in Southampton. With family ties to Southampton spanning generations, Nancy spent a lifetime of summers on the East End before making it her year-round home more than 25 years ago, where she and her husband raised their daughter.

Her experience includes Hamptons sales and rentals, from waterfront homes and multimillion-dollar properties to seasonal residences throughout Southampton, Wainscott, and Hampton Bays. That breadth of experience, paired with decades of local knowledge, gives her clients an informed perspective on both the market and the lifestyle.

Friendly, approachable, and hardworking, Nancy is known for attentive service and practical, informed guidance. She lives in Southampton with her husband, daughter, and two dogs.