21   Conservation area

(1)  A person shall not, in respect of a conservation area:

(a)  demolish, extend or change the outside of a building or work within that area, including changes to the outside of a building or work that involve the repair of the painting of unpainted brickwork, plastering or other decoration of the outside of the building or work,

(b)  damage or despoil a relic or part of a relic within that area,

(c)  excavate any land for the purpose of exposing or removing a relic within that area,

(d)  erect a building within that area, or

(e)  subdivide land within that area,

      except with the consent of the council.

(2)  The council shall not grant consent to a development application made in pursuance of subclause (1) unless it has made an assessment of:

(a)  the extent to which the carrying out of the development in accordance with the consent would affect the historic, scientific, cultural, social, archaeological, architectural, natural or aesthetic significance of the conservation area, and

(b)  whether a refusal to grant consent would constitute a danger to the users or occupiers of that land or the public, and

(c)  the provisions of any development control plan relating to heritage conservation areas.

(3)  The council shall not grant consent to an application made in pursuance of subclause (1), being an application to erect a new building or to alter the exterior of an existing building, unless the council has made an assessment of:

(a)  the pitch and form of the roof,

(b)  the style, size, proportion and position of the openings for windows and doors, and

(c)  whether the colour, texture, style, size and type of finish of the materials to be used on the exterior of the building are compatible with the materials used in the existing buildings in the conservation area.