Based on the price disclosed by Mack-Cali, Keystone paid about $90 per square foot for the office buildings at 224, 228 and 232 Strawbridge Drive in Moorestown. Both companies said the corporate center is 61 percent leased.
Bala Cynwyd-based Keystone said that Shaw Environmental, an engineering firm, occupies all 74,565 square feet of space in the building at 228 Strawbridge.
Mack-Cali, based in Edison, N.J., had put the properties up for sale in the spring and had paid $18.9 million to acquire them. It bought 224 and 228 Strawbridge from Metropolitan Life Insurance Co. for $10.2 million in 1997. The REIT acquired 232 Strawbridge from Matrix Development Co. for $8.7 million in 2004.