A report released last week by Cityrealty (click to find the download link) on the city’s hundred priciest condominiums ranks Fifteen Central Park West as themost expensive, with re-sales of apartment averaging $5,847 per square foot in the year ending August 31. The biggest sale of the year was also in the building, the $29 million trade of apartment 33D, which works out to $9,140 per square foot. It’s a further testament to the market power of 15CPW, anchor of the new Billionaire’s Belt stretching across Manhattan just south of Central Park.