Is $450 cleaning charge legal?

Future-Proof: Navigate Threats, Seize Opportunities at ICNY 2018 | Jan 22-26 at the Marriott Marquis, Times Square, New York

Q: I recently vacated my apartment and am in a dispute with the resident manager about the proper charges for cleaning and repairs. We had a three-bedroom unit, and I lived there for two years with my spouse and our four young children. I don't think we damaged the property significantly or that the cleaning needed is unusual after the length of time we lived there, especially for a family our size. The resident manager walked through the apartment a few days before we moved out to assess the condition and said that there would be some charges, but we thought they would be minor. We just received our accounting paperwork for our security deposit and were expecting the majority of our $1,000 deposit to be returned. But the manager has charges totaling nearly $1,500 and says we owe them money. When I called she said we left the property in horrible condition and she expected that we were going to thoroughly clean the property upon vacating. We admit we were too tired from ...