RUMC will use the space to open an ambulatory and urgicare center later this year, with a special focus on residents of the borough's West Shore. The hospital's main campus will remain the hub for all treatment and administrative offices.

It's the fifth lease signed at Corporate Commons since the Nicotra Group bought the two-building, 286,000-square-foot campus for $25 million in December 2008. The three-story office buildings were put up in the 1980s by Murray Construction and Silverstein Properties for then-tenant AT&T, which vacated its space at the end of '08, leaving the properties 100% vacant. The telecom giant hadn't housed any employees there since 2001.

Corporate Commons One and Two are part of the Nicotra Group's Corporate Park of Staten Island, which contains seven office buildings with a total of nearly one million square feet of office and hospitality space. The two buildings underwent a renovation after developers Richard and Lois Nicotra purchased them.