PR powerhouse Rubenstein Public Relations is relocating its New York corporate headquarters.

The agency is literally moving down the street: its new digs — in the Crédit Agricole CIB building, at 1301 Ave. of the Americas — is less than two blocks south from its current 1345 Ave. of the Americas location.

Caylon Bldg.Rubenstein’s move-in date is scheduled for April.

Rubenstein senior management said the agency’s new homestead is a response to growth in its global client base, as well as a recent expansion of senior-level practitioners. Rubenstein has occupied its current location for more than two decades.

“Our newly designed office space will accommodate our growing professional staff and provide the optimum environment for expanding our depth of services,” said Rubenstein Public Relations President Richard Rubenstein. “It was a priority for us to remain in the Plaza District on Sixth Avenue within close proximity to many of our corporate clients as well as to premier media headquarters."

Rubenstein founded the agency in 1987 after departing his father Howard J. Rubenstein’s firm, independent PR mainstay Rubenstein Associates.

The 600-foot, 45-story Crédit Agricole CIB building — also known as the Calyon Building, and previously known as the J.C. Penney Building and Crédit Lyonnais Building — will be home to 20,000 square-feet of Class A office space for Rubenstein’s forthcoming operations.

The tower houses more than 1.7 million total square feet and 30,000 square feet of ground floor and concourse-level retail space, as well as access to nearby Rockefeller Center. Other building tenants include multinational banking and financial services giant Barclays, law firm Chadbourne & Parke and public accounting firm CohnReznick.

Cushman & Wakefield executive managing director Robert Yaffa, vice president Wayne Van Aken and project coordinator Heather Reihs represented Rubenstein in the transaction.