Real estate transactions RAC Conference Center has renewed and expanded its lease for a total of 16,009 square feet in the Ashford Crossing II building at 1880 S. Dairy Ashford. Colvill Office Properties has completed, year to date, over 36,000 square feet in office leases at Brookhollow Central, a three-building, 800,000-square-foot office campus near Loop 610 and U.S.