Three 20-storey apartment buildings containing 695 units are being proposed for a Mississauga site that already hosts two existing towers and has a third on the way. An application submitted to the city seeks to change the official plan and zoning to permit the three additional towers. The property, owned by Chelsea on the Green I Limited Partnership, is at 4100 Ponytrail Dr. and 1850 Rathburn Rd. E. in the Rockwood Village neighbourhood.