36 For example, in respect of sale 9 (17 Ady Street) Mr Hammond's cost of totally reconstructing as new the same sort of improvements on that property as now exist was $888,000, while the cost of merely renovating the existing buildings was $120,000. The applicant's method of valuation involved first deducting the latter figure from the former, which gives $768,000. However, Mr Hammond's costings include site preparation works (being excavation, filling, grading, reclamation, underground drains, and reclaimed land retaining walls), which appear to be land improvements, amounting to $103,898, to which should be added (according to the oral evidence) approximately 40% of that figure for part of the "other costs of carrying out works" (being part of the builder's margin, preliminaries, professional and approval fees), giving a total of $145,457 for site preparation and related costs. Deducting the $145,457 from $768,000 leaves $622,543. The added value of the improvements that Mr Byron did in fact adopt for 17 Ady Avenue was rounded to $650,000.