The first call came before breakfast. Then five more by noon. By the end of the day, Greenwich, Conn. real estate agent Joy Metalios had fielded so many inquiries from New York City families that she stopped counting.

As Zohran Mamdani surges ahead in New York City’s mayoral race, city residents are racing to secure homes in the leafy, affluent enclaves of Connecticut and Westchester County — driven by anxieties over potential policy shifts that could reshape the local economic and social fabric.

Real-estate brokers in these suburban markets report a frenzy reminiscent of the early pandemic exodus, with properties vanishing in days amid fierce competition and all-cash deals that push prices far beyond expectations.

In Greenwich, long a city suburb for the well-heeled, available listings

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