The 1.7-million-square-foot One Vanderbilt being developed by SL Green Realty has TD Bank both as its lower-floor anchor tenant and for a retail bank.

But as The Post’s Steve Cuozzo reported back in 2014, the space at the top of One Vanderbilt can’t be occupied by office tenants until the $220 million transit improvements and connections are completed.

Mayor de Blasio repeated this not once but twice during his speech at Tuesday’s groundbreaking.

While the remark prompted a TD Bank official to make a face, the bank’s 200,000-square-foot tenancy won’t be affected. It will have an impact, however, on the portion of the building that was allowed to be added through the public improvement deal with the city.

Roughly, this would be half the building as it went from a 15 FAR (floor area ratio) to a 30 FAR.

SL Green Chief Executive Marc Holliday told me the 250,000-square-foot tenants the company is seeking are barely looking now, and likely won’t make any commitments until later in the process when “they can see it.”

The hole in the ground bounded by East 42nd and East 43rd streets and Madison and Vanderbilt avenues is about 10 feet away from its bottom, Holliday said. The building should be completely finished by 2020.

Rep. Carolyn Maloney (D-NY) said her favorite part of the project was the 14,000 square feet of public plaza between the tower and Grand Central Terminal,