Jens von Bergmann ran the numbers on land use in various municipalities in Metro Vancouver. The City of Vancouver is particularly interesting since it has so little land area left undeveloped.

UseCity of Vancouver land
single-family attached houses and duplexes34.0%
roads and right-of-way28.1%
recreation, open space, and natural areas15.2%
commercial3.9%
low-rise apartments (residential or mixed-use)4.1%
high-rise apartments (residential or mixed-use)1.9%

See Jens' post for the full charts and comparisons to other Metro Vancouver municipalities.

References