The basement âunitâ "This unit is located in the basement car park of 358 Flinders Street and enjoys easy access from Ogden street," the listing on realcommercial.com.au says. "The 100m2 secure space is available for immediate lease." No clutter â Marie Kondo would approve A similar sized residential unit in the city could set you back $850 a week. Ray White Commercial agent Troy Townsend said the owner of the building had spent $380,000 converting the previously unused basement into a money-spinner. He said there were two storage units for lease, both for $800 plus GST each, plus "about 13" carparks, which can be leased for $150 a month.