Building codes are changing under Australia's National Construction Code. Learn how new energy efficiency requirements may impact home builds and costs.

Building Codes are Changing: What the Energy Efficiency Requirements Mean


23 Feb 2026

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Building codes across Australia are changing, with updates to the National Construction Code introducing higher energy efficiency requirements for new homes. These changes aim to improve home energy performance, comfort, and sustainability, but they can also influence how homes are designed and built. If you are planning to build a home, understanding what these new standards mean can help you make informed decisions and plan ahead with confidence.

What building code changes are coming and why do they matter?

Recent updates to the National Construction Code have introduced higher energy efficiency standards for new homes across Australia. These changes are part of a nationwide move to improve how homes are designed and built, with a stronger focus on comfort, sustainability, and reducing energy use over time.

One of the most significant updates is the introduction of higher minimum energy ratings, including the 7-star energy rating for new homes. This means new builds must meet stricter performance requirements for how they heat and cool, helping to create more comfortable living environments while lowering long-term energy demand.

These building code changes matter because they directly affect how homes are designed, assessed, and approved. For first-home buyers planning to build, understanding the updated requirements early can help avoid surprises later in the process and support more informed planning decisions.

How could these building code changes affect the cost of your new home?

As building codes introduce higher energy efficiency requirements, new homes must meet more detailed compliance standards. These changes can affect the overall cost of a build, as builders adjust designs and specifications to meet updated requirements.

New compliance requirements may lead to increased costs across several areas, including materials, labour, and design assessments. For example, higher-performing insulation, upgraded glazing, or additional energy-efficient features may be needed to achieve the required rating. These changes can add complexity to the build process, which may be reflected in overall pricing.

Because these compliance costs form part of the construction process, they are often passed on to buyers. Understanding how these changes affect build costs early can help buyers plan their budget more accurately and make informed decisions before building begins.

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Why is securing your deposit early a smart way to save?

When building codes change, the timing of your contract can make a meaningful difference. Securing your deposit and signing a contract before a code deadline may allow you to lock in current design specifications and pricing, rather than being subject to updated requirements.

Once a contract is signed, the home is typically built to the agreed specifications in place at that time. This means buyers who secure their deposit early may avoid additional design changes or material upgrades required under new compliance rules, which can help manage overall build costs.

For first home buyers planning to build, understanding how timing affects pricing can support more confident decision-making and reduce uncertainty as new building standards are introduced.

What should you do to get started before the changes take effect?

If you are planning to build a new home, taking a few key steps early can help you prepare for upcoming building code changes. Acting before new requirements apply may enable you to lock in current pricing and design inclusions, rather than being impacted by updated standards.

Here are some steps to take:

  • Understand upcoming code changes and timelines
  • Finalise your preferred home design
  • Ensure land registration is in place
  • Seek early advice from a builder
  • Secure your deposit when you are ready

These time-bound steps can support a smoother planning process and may help buyers lock in current pricing and inclusions before new compliance requirements apply. For many buyers, this creates greater certainty and reduces the risk of unexpected changes during the build journey.

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Ready to lock in today’s prices before the building code changes?

Building code updates can influence design requirements and pricing, which makes early guidance especially valuable. Carlisle Homes provides a guided pathway to help buyers secure pre-change pricing, with clear advice on home design, inclusions, and next steps.

If you are considering building, speaking with our team can help you understand how current standards apply to your plans and what options are available before changes take effect. With expert guidance, you can move forward with greater certainty and confidence.

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