A Manhattan real-estate honcho pleaded guilty to fraud for scamming his bank out of $2.3 million as he built a luxury Battery Park City building where actor Leonardo DiCaprio bought an apartment.

J. Christopher Daly, 49, president of the Sheldrake Organization, now faces more than three years in the slammer and a fine of up to $250,000.

“I knew it was wrong to send duplicitous invoices to the bank, but I justified it to myself by saying we could pay it back, which we did,” Daly admitted in Manhattan federal court as his father wiped his eyes.

Daly conned his bank in 2007 by sending it duplicate invoices for money owed to the Battery Park City Authority that the bank had already paid — and then pocketing the bank’s money to make up his own budget shortfalls. He later repaid the cash.

DiCaprio bought a unit in the Riverhouse for a reported $3.6 million in 2008.