||The events of September 11, 2001 in the U.S.A have changed the perspective of owners and management companies towards security in office buildings. The initial reaction, which included general security measures with an unclear prevention role, is continuously being replaced by improved and more thorough decision-making process of prevention measures targeting specific types of threats. Currently, security mainly involves owners, their property managers and security consultants. This paper proposes the development of a city-wide Property Anti-terrorism Task Force, which will increase the cross-collaboration between real estate - law enforcement and emergency management agencies, allowing the enhancement of prevention measures against future attacks, strategically prepare property managers and mitigate future attacks’ effects. The paper benefits substantially by office market data from Grubb & Ellis and survey results from the Building Owners & Managers Association of Chicago, a market with several corporate headquarters, high-rise and trophy buildings.