PPOR subdivide CGT?

guys/girls,

if i was to buy a house approx. 900sq m as PPOR, then subdivide the rear block with access via another street (corner block), would i have to pay CGT, either if i subdivide & sell within 12 months or after 12 months?

note: i would not be getting any income from this at all in the way of rent etc. before or after subdividing & selling.

thanks in advance!![biggrin]

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