The Carlton Hotel was built by local developer Harry Wardman and opened on October 1, 1926.

[2] It was designed in a mix of the Beaux-Arts and Neo-Renaissance styles by architect Mihran Mesrobian.

The Sheraton Carlton began receiving guests again on October 1, 1988, the anniversary of its original opening.

Claret renovated the property in 2008, but the Great Recession significantly hurt both the luxury hotel industry and the Irish economy, and Claret Capital was not able to continue making payments on the loan it had secured from Barclays Capital.

[7] Westbrook Partners, a real estate investment firm based in New York City, purchased The St. Regis from Barclays in May 2011 for $100 million.