Discover whether your block is suitable for a granny flat, what it will cost to build, and whether the rental income stacks up. Covers all 8 Australian states — lot size rules, CDC vs DA approval, construction cost by finish level, equity analysis, rental yield, and an indicative approval-to-completion timeline.
Enter your details above to get instant, accurate results. Our calculator uses current Australian rates and rules — updated regularly.
Need help? Our guides explain how each calculation works and what the results mean for you.