Valuation by comparable sales evidence
28It is well established that, if comparable sales are available, the direct comparison of sales evidence approach is the conventional method of valuation (Graham Trilby Pty Ltd v Valuer General [2009] NSW LEC 1087 at 41(Trilby); Redeam Pty Ltd v South Australian Land Commission (1977) 40 LGRA 151 at 156; Riverbank Pty Ltd v Commonwealth (1974) 48 AJLR 483 at 484; Marroun v Roads and Maritime Services [2012] NSWLEC 199 at 196 (Marroun); El Boustani v Minister Administering the Environmental Planning and Assessment Act 1979 [2012] NSWLEC 266 at 23 (El Boustani); Tenstat Pty Limited v Valuer General / Woolworths Limited v Valuer General [2012] NSWLEC 1361 at 35 (Tenstat).
29The process of undertaking a valuation using the direct comparison of sales evidence approach comprises several steps, including the:
(a)accumulation;
(b)analysis;
(c)adjustment; and
(d)application
of potentially genuinely comparable sales (Trust Company Limited v Minister Administering the Crown Lands Act 1989 [2012] NSWLEC73 (Trust Company); Marroun, 197; El Boustani, 24; Tenstat, 36).
30A Court depends upon the established expertise of valuer witnesses called on both sides of the case (Marroun, 197).
31As Sugerman J observed in Bingham v Cumberland County Council (1954) 20 LGR (NSW) 1, at 18-19:
The valuer, in arriving at his opinion in these difficult matters may have to draw upon his general knowledge and experience, including perhaps experience in other situations which, although lacking in complete comparability, may yet provide an experienced valuer with guidance and suggestions as to the general approach which may be made and as to considerations which may become relevant.
32The accumulation of potentially genuinely comparable sales seeks to identify and establish a pool of relevant comparable sales from which information may be deduced concerning the value of the subject property (Trust Company,110 and 111;Marroun, 198; El Boustani, 25; Tenstat, 39).
33Generally the competing parties produce lists which the Court must sift to identify some which are "truly comparable", or a "reasonably representative" sample and "relevant and sufficient in volume" (Maurici v Chief Commissioner of State Revenue [2003] HCA 8; (2003) 212 CLR 111, at 121).
34Where the comparable sales differ in substantial ways from the subject property, a process of reasoning is required to establish their utility or otherwise (Leichhardt Municipal Council v Seatainer Terminals (1981) 48 LGRA 409, at 414).
35In Brewarrana v Commissioner of Highways (No 2) 6 SASR (Brewarrana) at page 551, Wells J observed:
there is no hard and fast rule by the application of which a valuer may, whatever the circumstances, draw the line that clearly separates the sales that are comparable from those that are not.
36Further, Wells J went on to observe that:
The evidence in this case suggests strongly to my mind that, at the initial stages, a valuer will almost certainly look at all known sales in potentially relevant areas, if for no other reason than to discern patterns of prices and changes in price levels over important periods.
37In Trust Company, Pain J identified a failure to set out a clear stepwise process enabling scrutiny of the facts and assumptions relied upon by the valuer in reaching his conclusions (including identification of transactions of potentially low comparability) (paragraph 115) as leading to that part of the valuation report not being given any weight (paragraph 119).
38The analysis of potentially genuinely comparable sales provides a common basis of measurement by seeking to convert all potentially comparable sales to a common basis of expression such as a unitary rate (rate per square metre, rate per hectare, etc), improved or unimproved (through allowance for the absence or existence of improvements, etc) and so forth (El Boustani, 26; Tenstat, 45).
39In Trust Company, Pain J identified a failure to set out a clear stepwise process enabling scrutiny of the facts and assumptions relied upon by the valuer in reaching his conclusions (including an absence of explicit reasoning in analysis of comparable sales) (paragraph 115) as leading to that part of the valuation report not being given any weight (paragraph 119).
40The adjustment of potentially genuinely comparable sales acknowledges the fact that no two properties are ever identical and seeks to convert those potentially comparable sales to a hypothetical expression of value as a unitary rate in the context of the subject property through the reflection of differences (such as size, location, use, date, etc) between the respective potentially comparable sales and the subject property (Trust Company, 112; Marroun, 202; El Boustani, 27; Tenstat, 47).
41Because properties are never identical, explicit and/or implicit adjustment for differences is obviously necessary but caution is required through making as few adjustments as possible, in a consistent manner, to ensure the reliability of the comparable sale when related to the subject property, with too much adjustment potentially rendering the comparable sale unsafe to use (Trilby [2009] at 36, Brewarrana).
42Therefore, as a matter of general valuation principle, fewer adjustments may be preferred to more adjustments and smaller adjustments may be preferred to larger adjustments in rendering comparable sales safe for use.
43In Brewarranaat page 551, Wells J observed:
It is, in my view, all a matter of degree: some adjustment is always necessary; too much adjustment will render it unsafe to use a sale, subject to such a degree of adjustment, for the purpose of the reasoning process in the comparable sales method.
44Caution in adjustment is required as too much adjustment renders the use of comparables unsafe (Trilby [2009], 36).
45Adjustment is a matter of degree, which must be carefully considered in each case (Marroun, 202).
46Caution is, therefore, required where large explicit and/or implicit adjustments are required, with particular caution required for large implicit adjustments (Trilby [2009], 36).
47Further, reflecting the significant roles of skill, experience and personal assessment in the adjustment process, the scope for differences in the quantum and direction of adjustment between valuers can be considerable (per Biscoe J in Holcim (Australia) Pty Ltd v Valuer General [2009] NSWLEC 225 (Holcim)).
48Accepted valuation practice permits both explicit and implicit adjustment for differences, such as in location, area and time, to enable valuers to have evidentiary comparable values which, following adjustment, account for the various differences with the subject property. Such adjustment is generally based on a reasoning process drawing on the skill and experience of the valuer and undertaken to derive an opinion of value through a deductive process (Trilby [2009], 35;Holcim; Marroun, 204).
49Explicit adjustment was preferred by Bly C in Jessica Investments Pty Ltd v Valuer General [2008] NSWLEC 1375 at 6 (Jessica):
Also, in my opinion, if a valuer does not have a final land value in mind, the detailed percentage adjustment approach could be utilised and revealed in an attempt to provide transparency. Otherwise the valuer's less transparent approach would be to identify a range of factors that distinguish in one way or another, the comparable sale from the subject property and, based on the valuers own judgment simply assert the land value.
50This view was echoed by Pepper J in Tomago Aluminium Company Pty Limited v Valuer General [2010] NSWLEC 4 at [45]:
To this it may be added that it is necessary to make explicit adjustments for differences so that the adjustment process is sufficiently logical. An implicit process comprising a single adjustment, rather than separately itemised and reasoned adjustments, risks rejection for want of transparency.
51A transparent process of explicit adjustment leading to an explicable assessment of value is preferred to an opaque process of implicit adjustment leading to an assertion of value (Jessica, 6; Marroun, 206).
52The assumptions made in deriving a hypothetical expression of value as a unitary rate in the context of the subject property should be justified by a clearly articulated logical and transparent reasoning process (El Boustani, 53).
53In Trust Company, Pain J identified a failure to set out a clear stepwise process enabling scrutiny of the facts and assumptions relied upon by the valuer in reaching his conclusions (including an absence of explicit reasoning in adjustment of comparable sales) (paragraph 115) as leading to that part of the valuation report not being given any weight (paragraph 119).
54Pain J identified:
A clearly articulated logical reasoning process which affords transparency and demonstrates an appropriate level of support for each of the key assumptions made
as lacking in a valuers report to which Her Honour did not then attribute any weight (Trust Company, 122 and 124).
55Such adjustment process should work forwards from the comparable sales to derive an opinion of value, rather than working backwards to justify an opinion of value previously formed (per Jagot J in Graham Trilby Pty Limited v Valuer General [2008] NSWLEC 217 at paragraph 25).
56The application of those potentially genuinely comparable sales to the subject property seeks to determine the value of the subject property through a consideration of the relevance (such as being limited, indirect or direct) of the unitary rate derived from those adjusted comparable sales relative to the subject (Trust Company, 114; Marroun, 208; El Boustani, 28; Tenstat, 62).
57While all comparable sales evidence may be considered relevant and so cannot be disregarded, the level of relevance of different comparable sales to the subject property may vary leading to the valuer attributing differing weight to different comparable sales (Marroun, 208).
58In Trust Company, Pain J identified a failure to set out a clear stepwise process enabling scrutiny of the facts and assumptions relied upon by the valuer in reaching his conclusions (paragraph 115) as leading to that part of the valuation report not being given any weight (paragraph 119).