HAWTHORNE, N.J. — The Kislak Company has completed the $11 million sale of 144 Diamond Bridge Avenue and 644 Lafayette Avenue, both multifamily properties in Hawthorne. The garden-style apartment complexes contain a total of 83 units. Amenities include laundry facilities and parking. Both properties were fully occupied upon closing of the sale. Jonathan Greenberg of The Kislak Company and attorney Louis Herzog of Feinstein, Raiss, Kelin & Booker represented the undisclosed seller. The buyer plans to upgrade the units.