What Is a Commercial Energy Audit?
A commercial energy audit is a systematic assessment of a building's energy consumption patterns, systems, and operations. The purpose is to identify where energy is being used, where it is being wasted, and what measures can be implemented to reduce consumption and costs. Energy audits are conducted in accordance with Australian Standard AS/NZS 3598:2014 and provide building owners with a clear, prioritised roadmap for energy efficiency improvements.
Through our referral service, we connect you with accredited energy auditors who have extensive experience across office buildings, retail centres, industrial facilities, hospitals, schools, and other commercial property types. These consultants use calibrated measurement equipment, energy modelling software, and industry benchmarks to deliver thorough, actionable audit reports.
Types of Energy Audits
Commercial energy audits are classified into three levels under AS/NZS 3598, each increasing in depth, complexity, and cost:
Level 1 — Walk-Through Audit
A Level 1 audit provides a broad overview of the building's energy use. It involves a site walkthrough, review of 12 months of utility bills, and benchmarking against similar buildings. The auditor identifies obvious energy waste and provides high-level recommendations. This level is ideal for building owners who want a quick understanding of their energy performance and potential savings before committing to a more detailed investigation.
Typical cost: $3,000 to $6,000
Level 2 — Detailed Audit
A Level 2 audit builds on the Level 1 assessment with a more thorough analysis of individual building systems. The auditor examines HVAC systems, lighting, hot water, building management systems, and the building envelope in detail. Energy consumption is broken down by end-use, and specific improvement measures are identified with estimated costs, savings, and payback periods. This is the most commonly requested audit level for commercial buildings.
Typical cost: $6,000 to $15,000
Level 3 — Investment-Grade Audit
A Level 3 audit provides the highest level of detail and is designed to support major investment decisions. It includes sub-metering, detailed engineering analysis, energy modelling, and financial modelling for recommended improvement measures. The report is suitable for use in Energy Performance Contracting (EPC) arrangements and capital expenditure approvals. Level 3 audits are typically undertaken for large facilities or portfolios where significant capital investment is being considered.
Typical cost: $15,000 to $20,000+
Who Needs a Commercial Energy Audit?
Energy audits are valuable for any commercial building owner or tenant looking to reduce operating costs and improve environmental performance. They are particularly important for:
- Building owners seeking to improve their NABERS rating or meet Commercial Building Disclosure requirements
- Organisations with sustainability targets or carbon reduction commitments
- Property managers looking to reduce outgoings and increase asset value
- Businesses participating in government energy efficiency programs such as the Victorian Energy Upgrades program
- Facilities undergoing major refurbishment or equipment replacement
- Tenants with high energy costs seeking to understand their consumption breakdown
Benefits of an Energy Audit
A well-executed energy audit delivers measurable value beyond simple cost savings:
- Reduced energy costs: Most audits identify savings of 10% to 30% of annual energy expenditure, with some measures paying for themselves within months.
- Improved NABERS rating: Implementing audit recommendations directly improves operational performance ratings, which can increase rental income and asset value.
- Prioritised investment: The audit report ranks improvement measures by return on investment, helping owners allocate capital where it will have the greatest impact.
- Occupant comfort: Many energy efficiency measures also improve thermal comfort, air quality, and lighting quality for building occupants.
- Regulatory compliance: Energy audits help meet reporting requirements under various state and federal programs.
- Carbon reduction: Understanding your building's energy breakdown is the first step toward meaningful carbon emissions reduction.
How Much Does a Commercial Energy Audit Cost?
Commercial energy audit costs range from $3,000 to $20,000 or more, depending on the audit level, building size, complexity of systems, and number of sites. For a detailed pricing breakdown, see our commercial energy audit cost guide.
Government incentive programs may subsidise part or all of the audit cost. The Victorian Energy Upgrades program, for example, provides incentives for energy efficiency improvements identified through audits. Our network consultants can advise on available funding in your state.
Get Connected with an Accredited Energy Auditor
Finding an experienced, accredited energy auditor is critical to getting a quality result. Through our referral service, we connect you with auditors who hold relevant accreditations and have a track record with commercial buildings in your sector. Fill in the form to receive obligation-free quotes, or use our consultant finder tool to search by location and specialisation.