



When I first started looking into granny flats, I kept seeing ads everywhere claiming we could build one for as little as $50,000.
I thought it was finally an affordable way forward.
Maybe it'd cost $120k-$150k, take a few months, and I'd start earning rental income or have space for mum to move in.
What I learned shocked me:









Why it matters:


$220k-$350k quotes with hidden costs
6-12 months for planning approval
18+ month builds
Months of lost time and opportunity
Budget blowouts and stress

$115k-$247k fixed prices, zero hidden costs
No planning approval needed (up to 70 sqm)
3-8 week builds
Owner-builder saves $30k-$50k (turnkey)
Property ready for rental use (week 8)
$150k-$200k estimated property value increase


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