None of the more than 9,700 federal buildings managed by 22 large agencies reach a 60 percent utilization threshold, according to the General Services Administration data. Maintenance of delinquent properties and empty space have plagued America’s real estate portfolio for decades, said Edward Forst, administrator of the General Services Administration. The department “has built a roadmap for federal agencies to operate under one roof and deliver what the American people expect—results that respect their tax dollars,” Forst said in a statement. That begins with moving the General Services Administration and the Office of Personnel Management under one roof, the agencies announced on April 20....