Under the Ordinance and the Plan the land cannot be used for any purpose
other than a dwelling-house. The question whether, where what is done on land
goes beyond the ordinary incidents of dwelling upon it, what is done constitutes
the use of it as a dwelling-house or something more has been considered by the
courts on a number of occasions. The question is one of fact and degree. In Lizzio
v Ryde Municipal Council 155 CLR 211 at 216-7, Gibbs CJ said: "Obviously a
person who is entitled to use land for the purpose of a dwelling-house may use
it for incidental purposes, such as garaging his car or housing his boat. No doubt
in some circumstances a householder who on an isolated occasion used his land
for the purpose of making sales from a stall might be held to be doing no more
than using his land for the purposes of a dwelling-house. For instance, if a
householder allowed his land to be used annually as the site for a fete to raise
money for some charitable purpose, the use of the land in that way might be
regarded as simply incidental to its use for the purposes of a dwelling-house. The
question is one of fact and degree. Having regard to the regularity and extent of
the activities involved in selling the flowers, and to the fact that some of the
flowers were grown on other land, there is no reason to disagree with the decision
reached in the courts below that the use of the land in the present case could not
be regarded as merely incidental to its use for the purposes of a dwelling-house.
In those circumstances, some further remarks of Glass JA in Foodbarn Pty Ltd v
Solicitor-General (1975) 32 LGRA 157 at 161 become apposite: "Where the
whole of the premises is used for two or more purposes none of which subserves
the others, it is, in my opinion, irrelevant to inquire which of the multiple
purposes is dominant. If any one purpose operating in a way which is
independent and not merely incidental to other purposes is prohibited, it is
immaterial that it may be overshadowed by the others...'".