Extell Development Company Share: Extell Development Company 525 E. County Line Road, Suite 13 Lakewood, NJ 08701 (732) 901-9006 Rep Info Map Whom to Contact Jack Mandelbaum 525 E. County Line Road, Suite 13 Lakewood, NJ 08701 Phone: (732) 901-9006 Send an Email What's Nearby? Distance: 5 10 15 20 25 50 mi.