Retrofitting focuses on improving existing buildings so they perform better in how they use energy, water and systems.
Rather than rebuilding, it works with what is already there.
Typical upgrades include:
• improving insulation and ventilation
• upgrading windows for better thermal performance
• reducing air leakage through sealing and detailing
• optimising heating and cooling systems
• introducing passive design strategies such as shading
• improving energy and water system efficiency
Many buildings across Australia were designed under older standards.
As performance expectations continue to rise, these buildings often no longer meet current benchmarks.
This creates a clear opportunity.
Retrofitting allows buildings to improve real performance, reduce operational costs and align with modern sustainability expectations.
A large portion of the existing building stock is already over 10 years old.
Improving these buildings often delivers greater impact than focusing only on new developments.
Retrofitting can:
• significantly reduce energy consumption
• improve indoor comfort and usability
• extend the life of existing assets
• reduce long term operational costs
For commercial buildings, upgrades can lead to substantial cost savings when systems are optimised and inefficiencies are addressed early.
Retrofitting is not always straightforward.
Common challenges include:
• aligning incentives between owners and tenants
• working within existing building constraints
• adapting plans as unknown conditions are uncovered
• managing upgrades while buildings remain in use
These factors require careful planning and a clear understanding of how the building currently performs.
For existing buildings, NABERS provides a way to measure real operational performance.
This makes it a valuable tool in retrofit projects.
By understanding how a building is currently performing, it becomes easier to identify where improvements will have the greatest impact.
NABERS can support retrofit decisions by:
• identifying inefficiencies in energy and water use
• benchmarking performance against similar buildings
• guiding upgrades that improve long term outcomes
Effective retrofitting starts with understanding the building as it operates today.
From there, targeted improvements can be made to achieve measurable gains.
Rather than relying on assumptions, performance data helps guide decisions that are practical, buildable and aligned with real outcomes.