Cadillac, which won a $1 million grant from the state in February to renovate its headquarters in Soho, announced Wednesday it’s moving back to its old turf in Detroit.

Steve Carlisle, a longtime GM executive who took over Cadillac in April, told the Wall Street Journal that he wants the company to be closer to GM’s vehicle design and engineering hub in suburban Detroit, especially as it prepares to roll out several new Cadillac models in coming years.

“We have a huge number of launches ahead of us,” Carlisle told the Journal. “We’ve got to think about how we take inefficiencies out of the communication process between the Cadillac team and the GM partners.”

The luxury automaker spent $12.7 million to transform several floors at 30 Hudson St. ahead of the controversial September 2015 relocation of its headquarters from Detroit.

Gov. Andrew Cuomo — a muscle-car enthusiast who owns a blue 1975 Chevrolet Corvette Stingray — attended the opening ceremony.

The $1 million grant was approved in January.

The state handout to the well-heeled carmaker drew fire from government watchdog as a waste of taxpayer dollars.

But a spokesman for the state Empire State Development said the money was never disbursed.

“While it’s disappointing, we understand this is a business decision being made by GM to co-locate the Cadillac headquarters with the rest of its corporate headquarters,” said spokesman Jason Conwall.

“The $1 million performance-based grant awarded by ESD was not disbursed. The State will do everything it can to help the employees that will be affected by this decision, including the Department of Labor’s Rapid Response team.”

GM has contributed $31,500 to Cuomo’s campaigns since 2011 and more than $140,00 to other state lawmakers, records show.

GM also has operations in Western New York.

When it moved to Soho, Cadillac said it was targeting younger urban drivers.

The government watchdog who first sounded the alarm bell over the $1M grant said the latest development shows it made no difference in the company’s decision to stay or leave New York.

“Shows how foolish it is for the state to hand taxpayer money to Cadillac or any other corporation. Businesses make decisions for business reasons and Cadillac came and left before the state bureaucracy could waste $1 million buying them luxury furniture,” said John Kaehny, director of Reinvent Albany.