NCC 2025: 5 Critical Changes That Will Reshape Construction

The release of the National Construction Code (NCC) 2025 has been delayed, however, the proposed updates outlined in the Public Comment Draft remain a valuable indication of where the industry is heading. With a strong focus on improving thermal efficiency, managing condensation, and supporting healthier living environments, these changes aim to lift the standard of building design, construction, and performance across Australia.

In this article, we’ll explore some of the key proposed updates from the draft NCC 2025 and their potential impact on stakeholders throughout the construction industry.

Increased Energy Efficiency Standards 

NCC 2025 introduces significant updates to improve energy efficiency and reduce emissions, helping buildings move toward a net-zero future. Key changes include:

• Stricter energy performance requirements for commercial and residential buildings, with an emphasis on heating, ventilation, and air conditioning (HVAC) systems to reduce energy consumption and enhance building performance.
• Support for electrification, ensuring new residential buildings are equipped with switchboards that can handle the increased electrical load from electric heating, cooking, and vehicle charging systems.
• Mandatory photovoltaics (PV), requiring the installation of solar panels in certain building classes to generate renewable energy, promoting sustainability and reducing reliance on non-renewable energy sources.
• New infrastructure for electric vehicle (EV) charging, ensuring switchboards have sufficient capacity to support EV chargers, facilitating the adoption of electric vehicles and supporting Australia’s transition to sustainable transportation.

These changes align with broader government goals for energy efficiency, emissions reductions, and climate resilience.

Improved Condensation Management

NCC 2025 introduces more effective strategies for managing condensation, reducing health risks and structural damage.

Key updates include:

• Stricter external wall requirements in various climate zones to prevent condensation within building structures.
• Updated roof ventilation provisions to better control moisture, particularly in climate zones 4 and 5.
• Expanded coverage to include hotels, hostels, and aged-care facilities, addressing condensation risks associated with higher occupancy and limited ventilation.

These changes aim to improve building durability and create healthier, safer living environments.

Healthier Living Environments

The influence of engineering in the pre-construction stage extends far beyond the initial planning phases and profoundly affects the project's In line with the growing focus on occupant well-being and sustainability, NCC 2025 seeks to enhance the health and livability of buildings. Key updates include:

• Stricter indoor air quality standards to improve the health of occupants.
• Increased toilet facilities for women, improving accessibility and comfort. This includes adding more toilets in large venues such as auditoriums and cinemas and installing dispensers for sanitary products in commercial buildings.
• Optimised lighting and ventilation systems to enhance comfort and well-being.
• Focus on reducing the urban heat island effect and incorporating green spaces into building designs.

These measures aim to create environments that not only meet safety standards but also promote better physical and mental health.

Stricter Safety and Fire Regulations

NCC 2025 strengthens fire safety measures, ensuring more robust protection for building occupants. Key updates include:

• Removal of Expert Judgement for fire safety. The phase-out of Expert Judgement will standardise safety levels and reduce subjectivity, ensuring more consistent fire safety outcomes across buildings.
• Mandatory sprinkler systems in all carparks with more than 40 cars and car stackers, addressing modern fire risks associated with vehicle designs and fuel loads.
• Tighter regulations on cladding, façade materials, and fire suppression systems, improving fire safety compliance and reducing risks.
  

These updates are designed to enhance safety, improve fire-resilience, and better protect occupants.

Reducing Water Leaks and Ingress in Buildings

NCC 2025 introduces several changes to mitigate water-related defects, particularly water ingress in apartments and commercial buildings. Key updates include:

• Consolidation of Water Management Sections: Parts F1 (surface water management, rising damp, and external waterproofing) and F3 (roof and wall cladding) will merge into a single section for clearer and more streamlined water management.
• Updated Performance Requirements: Revised performance requirements will enhance surface and sub-surface water management, promoting a more robust waterproofing system.
• Improved waterproofing provisions, ensuring all building types (e.g., storage and factory buildings) adhere to updated waterproofing and weatherproofing standards.
• New deflection provisions: A new provision will address deflection in designs to ensure long-term structural integrity and prevent water ingress.
  

These changes aim to prevent water leaks, reduce costly defects, and improve building longevity.

What This Means for You

Whether you're a builder, developer, architect, or property owner, NCC 2025 introduces important changes that will impact your future projects. Ensuring that your designs and builds comply with these new standards is essential to remaining competitive and avoiding costly revisions.

At Palantir Consulting, we specialise in structural defect investigations, façade engineering, peer reviews, and remedial engineering. We’re committed to supporting our clients through these changes, offering expert guidance and solutions that align with the evolving code.

If you need support in navigating these updates or ensuring your project is fully compliant with NCC 2025, reach out to our team today!

Your Partner in Engineering Excellence, 

Palantir Consulting