It has taken more than two years to resolve the bureaucratic quagmire of backlogged buildings at the New York City Landmarks Preservation Commission. Considering that some have been in limbo for four decades, it may have seemed like no time at all.

“This is really a mammoth undertaking,” Meenakshi Srinivasan, the chairwoman of the commission, said at a hearing on Tuesday at which the agency considered the fate of the final 13 of 95 properties on its backlog. “We can change the course of the commission’s practice to be better, more responsible, and timely. The process has been efficient, transparent and also incredibly rigorous, essentially starting from scratch and going back to all of these buildings.”

Ten buildings were designated as official landmarks on Tuesday, including the Bergdorf Goodman department store on Fifth Avenue. Of the remaining three, two did not win landmark protection, while a decision on the third was delayed. Preservationists said they wished more had been saved, but were grateful that in clearing its backlog the commission had granted landmark status to 27 properties over the past nine months, including the Pepsi-Cola sign on the Queens waterfront.