City Hall ‘lobby’ shut down: Blas

City Hall’s once-open door to lobbyists has been shut because of several ongoing investigations, Mayor de Blasio disclosed Tuesday.

The mayor — who is under the microscope for a shady Lower East Side land deal, his fund-raising activity and a proposed horse-carriage ban — said he now has “very, very, very little contact with lobbyists.”

He cited “the atmosphere we’re in and the ongoing investigations” for his change of heart. De Blasio went on the defensive at an unrelated Bronx press conference when reporters asked about his relationship with James Capalino (right), an old pal who became the city’s highest-earning lobbyist after de Blasio took office.

“I have not been in touch with Mr. Capalino,” de Blasio said. “He — going into the mayoralty — was someone I respected and was a friend and someone I talked to a lot over the years. But I do not have contact with him anymore.”

E-mails obtained by The Post Monday showed Capalino had almost unfettered access to the administration, contacting the mayor directly on behalf of clients.

But Capalino credited hard work for his firm’s success and a spokesman said the firm “has never relied on direct interaction with any of the five mayors who have held office since the firm was founded more than 30 years ago.”