zone r20 meaning Page 3

In Western Australia planning-speak, R20 means roughly 20 dwellings per hectare, with an average site area of about 450 m² per dwelling and a minimum around 350 m².

In practice, that’s why a ~900 m² block can often be split into two—assuming access, services, and your local scheme don’t throw a wobbly.

It typically suits single houses or grouped dwellings; heights, setbacks, and open space come from the R-Codes plus your council’s local planning scheme.

Translation: subdivision is possible, just not a free-for-all after three coffees.

For exact figures and any local variations, consult the Residential Design Codes (R-Codes) and your council before getting the spray paint out.