Granny Flat Planning Tools
Free calculators and checkers for Australian homeowners: approval pathways, size caps, build types and metering costs.
Full build budget
Approval pathway wizard
Size & setback checker
Build type comparator
Metering estimator
Planning tools FAQs
Are these granny flat tools free?
Yes. Every tool on this hub is free to use in your browser with no sign-up. Results are indicative only: confirm with your council, certifier or licensed trades before you lodge or sign contracts.
Which tool should I use first?
Start with the approval pathway wizard if you are unsure whether CDC or a full DA applies. Then check size and setbacks with the size & setback checker and budget with the cost calculator.
Do the tools replace professional advice?
No. They summarise common Australian rules and cost bands for planning. A private certifier, town planner or builder still needs to verify your specific lot, overlays and contract scope.
Related guides
Tools give you a starting point. These pages go deeper on rules, costs and design.
