Depreciation tax deductions are available to residential property investors whose investment property was built after 15 September 1987, commercial properties when built after 20 July 1982 and any refurbishments/renovations/improvements from 27 February 1992. Owners do not have to know when these works were undertaken -- this is researched by the tax depreciation provider who is qualified to estimate construction costs and asset values. Plant and equipment depreciation is also available on all new buildings and all existing properties when purchased prior to 10 May 2017. In summary, 99.9% of investment properties will be entitled to some form of depreciation deduction.