The city’s elevator repair bills are going through the roof.

Each of the 3,330 elevators in the city’s housing projects goes out of service an average of once a month, officials said.

Elevator failures and shutdowns for maintenance — along with huge raises for elevator mechanics — have caused costs to skyrocket.

The fattest paycheck in city government last year went to Richard Licht, a New York City Housing Authority elevator-mechanic supervisor.

With added back pay, Licht took home $346,427, according to records compiled by the Empire Center for Public Policy. That includes $145,963 for 1,095 hours of overtime.

A NYCHA elevator mechanic and a supervisor with the Department of Citywide Administrative Services, which services elevators in city buildings, made over $300,000 each. And 80 other NYCHA elevator mechanics and supervisors got $200,000 to $300,000.

A whopping $77 million was spent last fiscal year on city elevator staff, who got raises up to 35 percent and six years of back pay.

“I keep calling, calling, calling until they get tired of hearing from me and finally come out,” says William Mitchell, a resident of Baruch Houses.

NYCHA has stepped up its repairs since a 2012 court settlement, which mandates that it fix 90 percent of elevators within 24 hours after they are reported out of service.

NYCHA says it now restores service in less than six hours, down from an average 13 hours in 2010.

“We’re really committed to the safe operation of these elevators,” said Brian Clarke, senior VP for operations.

Still, a quick visit to Baruch Houses on the Lower East Side last week found two elevators stalled on the ground floor — one out for two days, residents told The Post. Some said they wait days for broken lifts to be fixed, making life especially miserable for the elderly and disabled.

“I keep calling, calling, calling until they get tired of hearing from me and finally come out to do something,” said William Mitchell, 54, who lives on the 10th floor.

“It breaks again and again,” said Robert Gonzales, 57. “A lot of people get stuck inside, and you’ll hear that alarm ringing.”

Asked about the 24-hour repair rule, he said, “No, that never happens. It takes them many days or even a week! If it breaks down on a Friday, it definitely won’t be fixed until Monday or probably later.”

A retired mechanic said breakdowns stem from a combination of old age, misuse and vandalism.

“Sometimes they overload the elevators. Sometimes they kick the doors off,” he said. Urinating in elevators, often by the homeless, can short the electrical system, and trash tossed down the shaft can block it, he added.

“There’s a hundred different reasons why elevators get stuck.

© 2015 New York Post