Investa – Achieving 5+ NABERS Ratings Across a National Office Portfolio
Investa is one of Australia’s largest commercial office real estate companies, managing a portfolio of over $11.5 billion in assets. With a strong focus on sustainability, tenant experience, and energy performance, Investa partnered with Bueno to uplift NABERS ratings and embed data-driven operations across all assets.
The goal was to achieve an average 5-star NABERS Energy rating across the entire portfolio—while reducing energy consumption, streamlining operational labour, and improving stakeholder visibility through analytics.
The Challenge – Unifying data and driving adoption across a diverse national portfolio
Investa faced the complex task of integrating five different technology protocols across 19 buildings nationwide. On top of the technical requirements, the project had to include fast onboarding of site teams and education of stakeholders on new workflows—all within a 12-month window.
The challenge wasn’t just technology—it was change management at scale, requiring seamless integration, collaboration, and alignment between property teams, contractors, and consultants.
The Journey Begins – A holistic approach to data-driven operations
Bueno was selected as the strategic analytics partner for its ability to deliver a portfolio-wide solution that could support NABERS uplift, operational labour optimisation, and energy performance.
The rollout focused on:
Holistic Portfolio Integration – Unified data from five protocols into one platform
Stakeholder Education – Upskilled site teams and aligned processes to new digital workflows
Third-Party Access & Hosting – Enabled consultants and engineers to interact with data directly
Root Cause Analytics – Delivered actionable insights to reduce cost and identify systemic issues
This transition empowered Investa to adopt predictive, data-driven maintenance practices that shifted operations from reactive to proactive.
The Results – Delivering measurable uplift in ratings and cost savings
Investa saw significant outcomes across its portfolio, including:
+0.40 stars average increase in NABERS Energy ratings
+0.80 stars average increase in NABERS Water ratings
$1.95 million in financial savings
7,225 MWh in energy reductions
82,912 kL in water savings
2,105 total actions raised—each linked to performance improvements
These results contributed to an impressive portfolio average of 5+ NABERS stars across all tracked buildings.
Unlocking operational savings and long-term value
Beyond energy metrics, Investa’s transition delivered broader portfolio benefits:
Enabled real-time NABERS tracking and performance visibility
Reduced operational overhead through root cause diagnostics
Improved tenant comfort and experience
Supported external consultants with direct access to hosted analytics
Built long-term resilience into the facilities management model
"In our first 18 months of partnership, we identified significant savings which helped us increase NABERS ratings across our buildings thanks to our new energy eduction and optimized operational labor. A great deal of these impressive achievements is a result of Bueno and their team of industry experts."
Paul Vandervis
General Manager Facilities Services, Investa
Conclusion / Next Steps – Future-proofing through innovation
Investa’s transformation stands as a model for how large portfolios can use data to drive strategic, measurable improvement. The integration of analytics across all sites has empowered facility teams, improved ESG outcomes, and future-proofed operations.
With a consistent 5+ NABERS rating portfolio-wide, Investa continues to lead in digital adoption and sustainability performance.
