Postcode Tool Methodolgy Note

The postcode tool takes the Rental Bond Board data released on

We have not cleaned the data further than that published on the site above. There may be some bonds lodged which have not had rents accurately described. This will not cause significant issues in areas with large numbers of bonds being lodged, but may in areas with small numbers of bonds.

We have grouped the most recent 3 months worth of lodged bonds. This is more than is necessary for more densely populated areas, but allows less densely populated areas can generally still allow meaningful analysis.

Some bonds are reported without a rent attached. These records have not been included in analysis of rents, but are included in the count of all bonds lodged in an area.


The bond data is published with postcodes identified. For our regions measure we have grouped postcodes to broadly align with SA4 areas but not attempted to split them. Comparison to SA4 should be done with caution. For Sydney, the SA4 regions are further adjusted to give sensible indications of populations as per the map below.

Map of Sydney