Numbers to Know: I.M. Pei celebrates his birthday, large East Side apartments are NYC’s priciest rentals … and more

“Numbers to know” is a weekly web feature that catalogues the most notable, quirky and surprising real estate statistics. Architect I.M. Pei marks his birthday with a multi-building celebration, Bloomberg administration goes on a conversion binge, and Americans are taking up more space at home. See this week’s countdown after the jump.

750,000
Square feet in the Bronx’s Kingsbridge Armory that will become the world’s largest ice rink under Mayor Michael Bloomberg’s plan [Mayor Michael Bloomberg’s Office]

$520,929
Federal reimbursement funds the New York Botanical Gardens will receive for Hurricane Sandy cleanup costs [Governor Andrew Cuomo’s Office]

24,000
Square feet in the historic, but vacant, Rockaway Courthouse that the city is converting into a medical center [Mayor Bloomberg’s Office]

$10,600
Average monthly rent for a three-bedroom or larger apartment on Manhattan’s East Side — the most expensive type of rental unit in the city [Miller Samuel]

$1,840
Average monthly rent for a studio apartment in Harlem [HarlemLofts]

1,000
NYPD members who are dedicated solely to counter-terrorism duties in light of the Boston bombing [Mayor Bloomberg’s Office]

953
Square feet of space that each person occupies in a typical U.S. home; in 1950 each person occupied just 291 square feet [DoorSteps]

96
Age that architect I.M. Pei, the oldest living Pritzker Prize winner, will turn tomorrow [Centurion]

79
Age of the Smith-Ninth Street subway station in Gowanus, which reopened this past week after a nearly two-year renovation [MTA]

34
Sales of multi-family properties in the first quarter of 2013 in Brooklyn — the most active borough in terms of transactions [Ariel Property Advisors]