Material Selection for Luxury Homes: Stone, Timber, Steel, Glass — Cost vs Impact How Much Do Premium Materials Add to a Luxury Home Build in Sydney? Premium material selection typically adds 25 to 40 per cent to the base construction cost of a Sydney luxury home, pushing per-squar... architectural-design bespoke-design custom-home luxury-home-design new-south-wales premium-residential sustainable-architecture sydney-architecture Aug 7, 2026