Brothers Zachary and Cody Vichinsky started Bespoke Real Estate in 2014 after only a few years each as brokers for the much larger Corcoran Group in the exclusive enclave of the Hamptons on Long Islands East End. The siblings hung their shingle on one idea: Marketing and selling properties priced at a minimum of $10 million.

Even in the financially fertile Hamptons, this has necessarily meant a limited, though still remunerative focus. It has also meant what the firm describes as concierge-like trappings to draw moneyed clients. These perks include chartered helicopter trips to the Hamptons from New York City and the integration of services such as interior design and architecture into the buying process.

Since its 2014 launch, the Water Mill-based Bespokeas in made to the customers specificationshas been involved in several eight-figure deals in Bridgehampton, Sagaponack and Southampton. The firm has also since emphasized a data-driven approach to these ultra-luxury sales.

It had $366 million in listings as of June 1, 2015, making it the sixth-largest brokerage in the East End.