Why you cannot look up a height limit for most suburbs

An empty result from a spatial search is routinely read as "no limit applies". It almost never means that. The standard exists; it sits in the written provisions of the planning instrument, keyed to the zone, rather than being drawn on the land. Which means a search that comes back blank has not told you the land is unconstrained — it has told you to open the instrument and read it for the applicable zone.

The table below counts, for each state, how many of this site's published suburbs carry each of the three controls as mapped data. New South Wales is the outlier: it publishes all three spatially, and is the only state in this dataset that does. Victoria contributes a small number of mapped minimum lot sizes and nothing else. Every other state publishes none of the three — not because the controls do not exist there, but because that state does not publish them in this form.

Even within New South Wales the coverage is partial. Of 315 published New South Wales suburbs, 66 carry all three controls as mapped data and 109 carry none of them. So the pattern a buyer should expect, outside metropolitan Sydney in particular, is that the height and the ratio are in the text rather than on the map.

A second trap sits inside the New South Wales figures. Where a control is mapped on only a handful of parcels in a suburb, the most common value among them describes those parcels and is not a rule for the suburb — and the parcels carrying no mapped value are not thereby unlimited. If a portal returns a figure for your address, use it. If it returns nothing, that is not a finding.