Granny Flat Cost Sydney 2026: Complete Price Breakdown & Budget Guide Granny Flat Cost Sydney 2026: Complete Price Breakdown & Budget Guide Author: giantA Pty Ltd — Cost Estimators & Building Designers Published: 17 July 2026 | Reading time: 7 min Related: Complete Gran... Home Renovation NSW Planning granny-flat residential-projects secondary-dwelling Jul 17, 2026