Brookfield Property Partners and AustralianSuper have closed on an office building in downtown Boston for $33 million. The 10-story building, located at 15 Broad Street, traded for just under $450 per sqf. CBRE/New Englandās Capital Markets team represented the seller, Broder, as well as procuring the buyer. āThe Boston office investment market continues to perform strongly when compared to other top U.S. cities,ā noted CBRE/NEās Brian Doherty.