HARRISON, NY-American Express Financial Advisors has signed a lease for an additional 3,737 sf of space at 500 Mamaroneck Ave., in Harrsion, bringing its total commitment at the property to nearly 24,000 sf.

ARLINGTON, VA-The National Rural Electric Cooperative Association plans to break ground soon on an 11-story office building in Arlington. Work on the 235,000-sf project, dubbed the Ellipse, is scheduled for the end of the first quarter in 2001.

MACON, GA-After increasing occupancy by nearly 30%, Ocwen Federal Bank is unloading Highridge Centre, a four-story, 195,252-sf asset just off Interstate 75.

DUBLIN, CA-Oracle and county planners will spend the next 60 days negotiating the details of the purchase. The software giant has already offered to buy the land for $3.8 million an acre.