Under planned changes, blocks of 700 square metres zoned R20 and below would be able to be subdivided, a big drop from the 900 square metres currently required. 

https://www.theage.com.au/national/western-australia/r-code-overhaul-could-boost-wa-block-values-supercharge-density-20260702-p60bxh.html?ref=rss&utm_medium=rss&utm_source=rss_national