About Mark O'Brien

Mark offers a luxury real estate experience serving NYC, with over 20 years of residential development, sales, and brokerage experience.

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Having lived and worked in New York City for more than 30 years, I offer experience of the all-important, yet often imperceptible, nuances of each neighborhood. Finding the city's hidden gems is one of my greatest passions, and am driven by creating real value on behalf of my grateful and loyal clientele.

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