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.

Nancy's passion is connecting people to the Hamptons. A natural ambassador for the region, she is exceptionally detail-oriented, deeply curious, and committed to getting every aspect of a transaction right. Her strong listening skills allow her to understand each client's priorities and provide thoughtful, practical guidance tailored to their goals. Nancy has supported fundraising efforts for Southampton Youth Services and is passionate about creating opportunities for young people and supporting youth development throughout the Hamptons.

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 - Sadie and Ella.