The commercial real estate company Avison Young will move its NYC headquarters to 45,000 square feet at 530 Fifth Ave., where the brokerage is also the agent for the RXR-owned building.

The company will occupy part of the third and the entire fourth floor, which will be connected by a new interior staircase.

The current tenant, spirits-maker Diageo, will be relocating and consolidating its North American offices at Three World Trade Center.

A. Mitti Liebersohn and Joe Harbert represented Avison Young in-house, while Dan Birney and Alexandra Budd represented RXR in-house.