All new homes and major renovations in Victoria must meet a minimum 7-star energy rating. This change is part of the National Construction Code (NCC) 2022 updates and will apply to building permits issued from May 2024 onwards.
If you’re planning to build, renovate, or extend, these requirements could impact your design, material choices, and budget — but they can also deliver a more comfortable, cost-effective home in the long run.
In this article, we’ll unpack what the 7-star standard means, how it’s measured, and how to design your home to meet (and even exceed) the requirements.
Why the Change to 7-Star?
Previously, the minimum energy rating for new homes in Victoria was 6 stars. Moving to 7 stars is a significant step, aiming to:
- Reduce greenhouse gas emissions
- Lower household energy bills
- Improve indoor comfort
- Reduce the strain on heating and cooling systems
In practical terms, a 7-star home uses around 25% less energy for heating and cooling than a 6-star home. That’s a big difference in both comfort and running costs.
How Is the 7-Star Rating Calculated?
Energy ratings are assessed using the Nationwide House Energy Rating Scheme (NatHERS).
A qualified assessor uses software to model:
- The home’s design (size, layout, orientation)
- Insulation levels
- Window type and placement
- Building materials
- Climate zone
The software calculates how much energy the home will need to maintain a comfortable temperature year-round. The higher the star rating, the less energy required.
Key Changes Under the NCC 2022 7-Star Requirement
1. Better Insulation and Glazing
- Ceilings: Higher R-values for insulation (for example, R6.0 in cooler climates).
- Walls: Thicker or denser insulation materials to improve thermal performance.
- Floors: Increased insulation in raised floors or slab edges.
- Windows: Double glazing will become standard in most new homes and major renovations, with higher quality frames to prevent heat transfer.
Tip: In Victoria’s cooler regions (like Geelong and the Surf Coast), upgrading window performance is one of the quickest ways to boost your energy rating.
2. Smarter Home Orientation
The position of your home on the block makes a huge difference.
- North-facing living areas capture winter sun.
- Eaves or shading devices block harsh summer sun.
- Minimal west-facing glazing reduces overheating in summer.
3. Efficient Heating and Cooling
A 7-star home can maintain comfortable indoor temperatures with minimal mechanical heating or cooling.
- Zoned heating/cooling systems
- Ceiling fans to improve air circulation
- Energy-efficient appliances
This means lower utility bills and a reduced carbon footprint.
4. Thoughtful Material Choices
- Use materials with high thermal mass (like concrete or brick) in areas where you want to store heat.
- Choose lightweight materials in areas that need quick heating/cooling response.
- Incorporate insulated cladding systems for both thermal performance and aesthetic appeal.
5. Air Tightness and Draught Proofing
A big part of achieving 7 stars is preventing unwanted air leakage.
- Seal around windows, doors, and service penetrations
- Install draught stoppers or seals
- Ensure exhaust fans are fitted with self-closing vents
What This Means for Renovations and Extensions
If you’re renovating or extending, the new standard can still apply to your project, depending on the scope.
- Extensions: The new work must meet the 7-star standard, and in some cases, the whole house may need reassessment.
- Major renovations: Significant upgrades may trigger compliance requirements for insulation, glazing, and more.
Example: Adding a second storey to a Geelong West weatherboard may require upgrading the ground floor insulation to meet the overall 7-star standard.
How to Achieve 7 Stars Without Blowing Your Budget
- Engage your designer early. At Treadlite Designs, we integrate energy efficiency into the first sketches — not as an afterthought.
- Optimise your orientation. If you haven’t purchased land yet, choose a block that allows north-facing living spaces.
- Prioritise upgrades that make the biggest impact. In Victoria, glazing and insulation often give the highest star rating boost for the cost.
- Avoid design choices that work against your climate. For example, extensive west-facing glass is costly to shade and cool in summer.
Key Takeaways
- 7-star is now the minimum for new homes and many renovations in Victoria.
- Achieving the standard requires a combination of better insulation, glazing, orientation, airtightness, and materials.
- Designing with the 7-star standard in mind from the start is the best way to save money and avoid redesigns.
Ready to Design Your 7-Star Home?
Treadlite Designs specialises in creating beautiful, functional, and energy-efficient homes for clients across Geelong, the Surf Coast, and regional Victoria.
We’ll guide you through the new NCC requirements, work closely with a NatHERS assessor, and ensure your design meets the 7-star standard while reflecting your style and budget.
Contact us today to book your obligation-free design consultation and quote.