The properties include class A office and office/R&D spacein three suburbs. Among them are 300, 600 and 800 Federal St. inAndover, which have 119,970 sf, 115,572 sf, and 158,655 sf,respectively. The firm also acquired Three and Eight Federal St. inBillerica, which have 90,000 sf and 80, 000 sf, respectively; andSeven and Eight Oak Park Dr. in Bedford, which have 40,000 sf and62,500 sf of office/R&D space, respectively.

Mitchell Hersh, president and CEO of Mack-Cali, says thebuildings were completed between the early 1980s and 1990s. Therental rates average in the low $20s per sf.

"Boston has been in my sights for quite awhile," Hersh tellsGlobeSt.com. "These are all along the Amtrak line and this is alogical extension for us. It extends our Northeast presence intothe Boston area, an office market with considerable value-addedpotential." His company now has interests in 304 propertiesaggregating 34.3 million sf, primarily located from Washington, DCto Boston.