Like a reality show come home, residents at the Cumberland House on East 62nd Street are preparing to trade places with the workers who have hailed their cabs, taken out their trash and made sure their kids get on the right school bus.

If a strike by the city’s building workers comes to pass, residents of the tony co-op will have to pick up the slack — and anything else that falls on the floor.

“I’ll sign up for lobby attendant,” said Sherry Miller, 62, a jewelry designer and resident for 36 years. “I’m worried about people who don’t live here trying to come in.”

At 96, Alfred Berger said he’s willing to do his part — sorting mail, a task that’s normally handled by the building’s concierge, who is on a staff of nine union workers at the 86-unit building at 30 E. 62nd St.

“A lot of residents have signed up to do our shifts,” said Berger. “But nobody wants them to strike. They’re an important part of our lives. They do a lot for us.”

Joseph Lopez, a doorman at the building for 20 years, said he and his colleagues will be missed by residents if they end up on a picket line.

“For the residents it’s going to be chaotic. They’ll have to take responsibility for the things we do,” said Lopez.