One of the largest office-leasing deals of 2014 slipped quietly under the radar in the spring when the U.S. Drug Enforcement Administration renewed nearly 600,000 square feet in West Chelsea, The Real Deal has learned.

The New York division office of the federal law enforcement agency signed on with Elie Hirschfeld at Hirschfeld Properties in May to renew its 570,000 square feet at 99 Tenth Avenue, a 10-story former industrial building occupying a full block between the High Line and the Hudson River.