Luxury Home Cost Guide Sydney 2026: Per-Square-Metre Breakdown by Suburb TL;DR Building a luxury home in Sydney in 2026 costs between $4,500 and $10,750+ per square metre for construction alone, with total project costs reaching $2.5M–$8M+ depending on suburb, site conditi... bespoke-design construction-costs custom-home luxury-home-design premium-residential sustainable-architecture sydney Aug 10, 2026