NSW Building Cost Estimator

Instantly estimate building costs for duplexes, granny flats, custom homes, KDR and extensions in Sydney. By Buildana.

NSW Building Cost Estimator — Free Tool by Buildana Instantly calculate construction costs for residential projects in Sydney and NSW. Whether you're planning a custom home, duplex, knockdown rebuild, granny flat, or extension, get a ballpark estimate in seconds — without chasing quotes. HOW IT WORKS Select your project type, enter the floor area in m², and choose your finish level (Budget / Standard / Premium). The tool calculates a cost range based on Rawlinsons Australian Construction Handbook data for the Sydney market. WHAT IT COVERS • Custom homes • Duplexes • Knockdown rebuilds (KDR) • Granny flats • Home extensions FINISH LEVELS • Budget — basic finishes, volume builder standard • Standard — mid-range inclusions, quality fixtures • Premium — high-end finishes, custom joinery WHY USE THIS Most builders won't give you a number until you've signed a contract. This tool gives you a realistic starting point so you can walk into conversations with builders knowing your ballpark — not guessing. Built by Buildana, a Sydney-based custom home builder and developer. For a detailed quote on your project, visit buildana.com.au. Data source: Rawlinsons 2021 Australian Construction Handbook (Sydney regional rates). All estimates are indicative only and should be verified with a licensed builder.