A reputed slumlord who is part of the development team getting slammed over conditions at the moldy, asbestos-laden Chelsea Hotel is taking over the former “Waldorf-Astoria of Brooklyn.”

Developer David Bistricer confirmed he has bought the landmark Hotel Bossert in Brooklyn Heights from the Jehovah’s Witnesses, and plans to turn it back into a 302-room hotel.

He declined to reveal the purchase price but said he plans to have it running as a hotel again by 2014, pending city approvals.