Despite belt-tightening and record losses at Wall Street banks, demand for luxury dwellings was strong, said the association of New York estate agents.
On average a Manhattan home costs $1.6m (£0.8m), up from $1.1m a year ago.
However in other parts of New York City property prices are on the slide, with Queens and Staten Island down 5% and the Bronx slipping 1%.
New York City 2010
