I see it now, Table 4
R30 Max Plot Ratio .5 Min open space 45%
So on my 706m2 block I could have a 353m2 footprint and up to 8 44m2 dwellings
rick, you're definitely right. the genral public, including 90% of agents, have no idea what the nov 2011 codes mean, and the new ones coming out will change things again and really mix it up. very exciting time to be in perth property, lots of profit and niches to be carved out over the coming 5 years.
Ergo,
in a survey strata / green title situation, you need a min lot size of 270sqm and an avg of 300. if you want a battleaxe lot without common property, min size is 420sqm.
this is covered in paet 6 of the r codes.
plot ratio is living area only and ONLY used for calculations for multiple dwellings.
this is calculated against part 7 of the r codes.
you could have a 10 storey house if height limits allowed, as long as your open space remains at or above 45% of lot (possibly including any portion of CP).
in other words, with a single house, plot ratio isnt a calculation used.
multiple dwellings have had the density per hectare calculation removed and replaced with plot ratio calculation with reduced parking requirements to increase density without re-writing and re-constitutionalising state planning policy.