35 Clause 30 of SEPP SL states that consent must not be granted unless the consent authority is satisfied that adequate regard has been given to the design principles set out in Division 2. The relevant design principle is found in cl 31 and relates to neighbourhood amenity and streetscape. This clause relevantly states that a proposed development should
(a) recognise the desirable elements of the location's current character (or, in the case of precincts undergoing a transition, where described in local planning controls, the desired future character) so that new buildings contribute to the quality and identity of the area, and
(b) ….
(c) maintain reasonable neighbourhood amenity and appropriate residential character by:
(i) providing building setbacks to reduce bulk and overshadowing, and
(ii) using building form and siting that relates to the site's land form, and
(iii) adopting building heights at the street frontage that are compatible in scale with adjacent development, and
(iv) considering, where buildings are located on the boundary, the impact of the boundary walls on neighbours, and
(d) be designed so that the front building of the development is set back in sympathy with, but not necessarily the same as, the existing building line, and
(e) embody planting that is in sympathy with, but not necessarily the same as, other planting in the streetscape, and
(f) retain, wherever reasonable, major existing trees, and
(g) be designed so that no building is constructed in a riparian zone.
36 GPC No 5 (Wombarra) Pty Ltd v Wollongong City Council [2003] NSWLEC 268 establishes four principles for the specific case of medium density housing for older people fitting into the streetscape in a low-density housing area. These are:
o the medium density development does not have to be single-storey to be compatible with the streetscape even where most existing buildings are single-storey;
o the scale of the medium density should be visually broken up;
o existing site characteristics that reduce visual dominance should be retained;
o where new materials and forms are introduced, this should be done with sensitivity to the existing forms and materials.