Can I Subdivide?

Before even starting to consider the costs, timeframes and likely returns involved with subdividing, it’s worth doing a little research to first assess whether your block is eligible for subdivision. This will depend largely on whether your land is deemed large enough to subdivide under the R-Codes and zoning regulations that apply to your specific location.

R-Codes are a set of policies that mandate specific variables relating to WA’s residential developments and can include considerations like boundary setbacks, minimum open space requirements, building sizes and privacy. R-Codes also dictate how many dwellings can be built on specific parcels of land and this varies by shire, suburb and even street location. So, even if you have seen other subdivisions proceed in your local area, this does not necessarily mean the same zoning will apply to your property address.

Most Perth suburbs are zoned R20 or below which makes them low density. Higher density zones can be found in certain activity hubs and within suburbs that have high levels of transport services and amenity infrastructure. In order to determine whether your land is suitable for subdivision, you’ll first need to ascertain which R-Code zone your property falls in. You can usually find out this information on your local shire website or by visiting Intramaps, an online mapping tool that is used by many local government authorities. In simple terms, to quickly assess whether your land is eligible to be subdivided and, if so, how many lots can be created, use the following steps:

  1. Establish which R-Code applies to your address by visiting your local shire website or the Intramaps website. Let’s assume your property is zoned R20.
  2. Check the average site area per dwelling permissible under the R-Code zone applicable to you using the table below. For R20, this is 450m².
  3. Divide your total land size by the average site area per dwelling. Let’s assume your land is 950m² so this equates to 2.1.
  4. So, rounding down the figures, this means that putting aside any other relevant considerations, potentially your land is suitable for subdividing into 2 lots.
R-Code Zoning Average Site Area Per Dwelling (m²)
R20 450
R25 350
R30 300
R35 260
R40 220
R50 180
R60 150
R80 120


If you find your land falls slightly short of the minimum required area to subdivide, this does not necessarily mean all is lost. In certain circumstances and depending on the individual characteristics of the site in question, the average site per dwelling mandated by R-Codes can be slightly reduced, subject to WAPC approval.

If you’re interested in the possibility of freeing up cash, reducing your mortgage or building wealth through subdivision, contact the friendly surveying and property development experts at Multiply Property Group for a chat today.