The Court's interpretation of the height control in DCP 97
16 DCP 97 is based on objectives, performance criteria and controls. The objectives of the height control are that buildings:
· are appropriate in scale, compatible and complementary with areas of townscape significance, the site and its context;
· do not dominate or overshadow the public domain; and
· achieve high environmental amenity.
17 The DCP contains performance criteria for height. The relevant criteria are that the height of new buildings:
· adopts the predominant height and scale of adjoining buildings and has a similar bulk and mass to the neighbours…;
· the bulk is distributed on the site so as to ensure there is no significant loss of amenity to adjacent buildings, public streets and spaces; and
· maximises solar access in the public domain and areas of private open space;
· for infill development, maintains proportions in relation to street width.
18 The height control, itself, is presented in four paragraphs. The first paragraph says that buildings must not exceed the height specified in the height Control Map, which for this site is 18m. The second paragraph says that where "in exceptional circumstances" the height is varied for infill development, it must not exceed the width of the street plus 1.6m. (Note: the words do not say this; however, when they are combined with what appears to be the likely relevant untitled diagram, this is their meaning.) The third paragraph relates to buildings fronting to lanes. It refers to a diagram that does not exist. When the words are read with what appears to be the likely relevant untitled diagram, they make no sense. While this is unfortunate, nothing turns on it in this case.
19 The fourth paragraph of the height control is critical for this case. It says that
in special circumstances council may support a part-storey above the prescribed height limit provided the part-storey is wholly within the 36-degree attic height plane as defined in Figure E3.
20 Three questions arise in the interpretation of this part of the control. The first question is whether an additional floor above the height limit has to be under a constructed roof, rather than a theoretical 36-degree plane. This is the question that McClellan J answered to the effect that the roof does not have to be constructed.
21 The second question is whether the 36-degree plane springs from the proposed building or from the boundary line. McClellan J did not answer this question. At the April 2005 hearing the parties were at issue on this question. In my opinion, the 36-degree plane must spring from the building. Figure E3 clearly shows the plane springing from the eaves of the building. Moreover, the plane is referred to as "36-degree attic height plane". The expression attic plane indicates that it springs from the building, as an attic can exist only as part of a building.
22 As indicated above, on the site's critical boundary at Springfield Avenue the proposed building is not set back, so the 36-degree attic plane is the same whether it springs from the building or the boundary. It is the third question that is critical to the assessment of the application, namely whether there can be more than one part-storey above the height limit within the 36-degree attic height plane.
23 A first reading the attic height plane clause suggests that there can be only one part-storey above the height limit, since the word "part-storey" is in the singular. The applicant's advocate, Mr P McEwen SC, drew my attention to s8 of the Interpretation Act 1987, which states that a reference to a word in the singular form includes a reference to the word in the plural form. The word "part-storey" therefore means also "part-storeys".
24 The problem with the assumption that "part-storey" means also "part-storeys" is that it is inconsistent with Figure E3, the words "attic height plane" and DCP 97's definition of an "attic" as the top storey of a building. There can be only one top storey in a building. In my opinion, to apply the plural of part-storey to the attic height plane clause would be contrary to the tenor of the clause. It would also be contrary to the objectives and performance criteria of the height control, since a building containing two, three or even four part-storeys above the height limit would be alien to the existing buildings of Potts Point.
25 I am strengthened in the above conclusion by the fact that s5(2) of the Interpretation Act 1987 states that the Act applies to an instrument except in so far as the contrary intention appears in the instrument. I note also that in Chalmers & ors v Sutherland Shire Council [1997] NSWLEC 120 Lloyd J found that the presumption that words in the singular include the plural must yield to the context.
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