What size block can I subdivide?
The size of the land you will need to subdivide will depend on the planning zone, overlays and schedules that affect the land. Properties in a General Residential Zone or Neighbourhood Residential Zone may also need to comply with the minimum garden requirement which is generally 25% where created lot is less than 400m2.
You will also need to consider whether there is enough space behind and next to the existing house to accommodate another residence and drive way if you intend to keep the existing dwelling and subdivide the rear yard, and the location of any easements which may prevent that land from being built over.