The Arlington County Board unanimously voted to approve plans for the modernization of the Crystal Square 3 office building in Crystal City at its meeting last night.

The nearly 250,000 square foot space sits on top of the Crystal City Shops. After the redevelopment, the building will be reclassified as “Class A” office space and rebranded as 1770 Crystal Drive.

“This redevelopment is part of the ongoing public and private investments in Crystal City that will help ensure it remains one of the region’s premier urban villages,” County Board Chair Mary Hynes said in a statement.

The property’s developer, Vornado, took the opportunity to plan the upgrade after its primary tenant, the U.S. Marshals Service, announced it will be moving its 1,600 employees to another Vornado property on S. Clark Street next year.

Plans to modernize the building include reshaping it to add approximately 10,000 square feet of office and retail space and replacing its facade.

The retail space on the first floor will be reconfigured and the second floor plaza will be turned into additional office space, which could be converted to more retail space in the future. The existing concrete facade will be replaced with glass and metal panels.

The top floors will also be repurposed to create open terrace areas. On the ground level, the facade will be pushed back seven feet to create a wider sidewalk along Crystal Drive.

Finally, a new entrance to the Crystal City Shops will be moved to the north side of the building.