The other day I was shown the depreciation schedule of a property. Straight away one figure jumped out at me as being odd. The total division 43 (building write-off) deductions over 40yrs is around 165k. The property was purchased brand new for 480k. In comparison, my IP of comparable purchase price and age has total division 43 deductions over 40yrs of over 450k. I don't understand why there is such a big difference. My report was done by one of the recommended/big quantity surveyors around here where as I haven't heard of the folks that did the other report. Is it common for 2 different quantity surveyors to come up with totally different division 43 totals on the same property? Would it be worthwhile getting another report done to maximise deductions? If a new report is produced and it turns out to have a lot more deductions, could past tax returns be amended?