(1) A building built to amended plans (the new building ) is significantly different from a building built to the unamended plans (the "old building") if—
(a) the floor area, roof area or volume of the new building has increased or decreased by more than 1%; or
(b) the new building is not same class of building as the old building; or
(c) if the old building had parts that are not of the same class of building—
(i) the position of the parts in the new building has changed; or
(ii) the floor area, roof area or volume of the parts in the new building has increased or decreased by more than 1%; or
(d) any dimension of the perimeter of the new building, including the perimeter of the building's footprint or an elevation, has changed by more than 1%; or
(e) the type of material to be used in the new building to form a structural element, roof, floor or external wall cladding has changed; or
(f) the number of storeys or buildings in the new building has changed.
Example of change of dimension
The height of the building increases from 3m to 3.5m. The change of the dimension is more than 1%.
Note An example is part of the regulations, is not exhaustive and may extend, but does not limit, the meaning of the provision in which it appears (see Legislation Act, s 126 and s 132).