NatHERS is the star rating system measuring how much energy your home’s building envelope needs to stay comfortable. Understanding it helps you build a better, cheaper-to-run home.
NatHERS (Nationwide House Energy Rating Scheme) rates your building from 0-10 stars. It measures the walls, roof, windows, and floors — not appliances or solar panels. Higher stars = less energy needed = lower bills = more comfort.
Up from 6 stars. Gold Coast is Climate Zone 10 (warm humid). Primary challenge is cooling. Well-designed homes can reach 8-9 stars with passive design alone. For more on the NCC changes, see our guide to Gold Coast building codes and regulations.
Positive: North-facing living with shading, ceiling insulation R4.0+, cross-ventilation, eaves 600mm+, light roof colour.
Negative: Large west-facing windows, no insulation, dark roof, no cross-ventilation, excessive unshaded glass.
Standard home: $500-$800. Complex home: $800-$1,500. Pre-assessment during design (recommended): $300-$500.
Free: Orient living north, minimise west glass, cross-ventilation, eaves, light roof.
Moderate cost: R5.0-R6.0 ceiling insulation, R2.5+ wall insulation, reflective sarking, performance glass, ceiling fans.
Worth it: Double glazing on west/east windows, external louvres.
Not worth it on Gold Coast: Triple glazing, under-slab insulation.
For a comprehensive guide to sustainable design strategies, see our article on sustainable home design on the Gold Coast.
New habitable rooms must meet current requirements. Cosmetic renovations generally don’t trigger requirements for existing areas. See our guide on renovation costs for what different renovation types involve.
No for NatHERS (envelope only). Yes for the whole-of-home energy budget.
7 to 8 stars: minimal extra cost, meaningful benefit. Above 9: diminishing returns.
7-star minimum on the Gold Coast. Achievable with good passive design at minimal extra cost. Consider energy from the first sketch and your home will naturally perform well.
Design Science designs homes that consistently exceed 7 stars through passive design principles. Book a $280 consultation.
David Steadman
Licensed Builder & Building Designer
David Steadman is the founder of Design Science, a Gold Coast building design practice backed by over 30 years of hands-on construction experience. One of few Australians holding both a QBCC Builder's Licence and Building Designer licence, David brings a rare combination of design thinking and practical building knowledge to every project.
