Should You Aim for 8, 9 or 10 Stars? When Going Beyond 7 Pays Off
Seven stars is the minimum, not the ceiling. Here is when pushing to 8 or higher is worth the spend and when it is not.
Seven stars is the floor for new NSW homes, but plenty of owners ask whether they should aim higher. The answer depends on your goals, your budget and how long you plan to live in the home. Here is an honest look at the trade-offs.
What extra stars buy you
Each step up the scale means less energy needed for heating and cooling, lower bills and a more stable, comfortable home. The jump from 7 to 8 stars is often achievable with refinements rather than radical change. Pushing toward 9 and 10 usually requires premium glazing, higher insulation and careful detailing.
| Target | Typical effort | Best for |
|---|---|---|
| 7 stars | Standard good design | Meeting the minimum efficiently |
| 8 stars | Modest upgrades | Lower bills, long-term owners |
| 9 to 10 stars | Significant investment | High-performance and near net-zero goals |
When it makes sense
- You plan to stay in the home for many years and want the lowest running costs.
- Comfort in extreme heat or cold is a priority.
- You are aiming for an all-electric, low-emission or near net-zero home.
When 7 is the smart number
If budget is tight or you may sell within a few years, reaching 7 stars efficiently and directing your spend elsewhere can be the wiser financial call. The law asks for 7, and a well-designed 7-star home is already comfortable and efficient.
The diminishing returns curve
Each extra star costs more than the last. The early gains are cheap, the final stars are expensive. A good assessor can show you the cost of each additional half-star for your specific design so you can decide with real numbers.
Frequently asked questions
Does a higher rating add resale value? Efficiency is an increasingly valued feature, though the financial return varies by market.
Can I decide later? It is far cheaper to set the target during design than to chase stars after documentation.
Curious what 8 stars would cost on your design? Ask us to model the options.
Free guide
10 Tips for a 7-Star New Build
Our practical PDF guide to building a comfortable, compliant NSW home - the design decisions that matter most, and how to reach 7 stars without overspending.
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BASIX & NatHERS specialists helping NSW homeowners and builders achieve energy-efficient, compliant homes.