NABERS UK – Energy for Offices

NABERS Energy measures the efficiency of an office building and rates its performance. The energy rating works by comparing the energy consumption of a building against a set of benchmarks that have been developed using actual data.

NABERS Energy rates the base building performance. This includes central services like heating and cooling systems, lifts and lobby lighting, allowing office buildings to be compared based on how the central services are being run to provide a comfortable working environment for users.

There are two official documents which explain in detail how ratings are to be calculated. These are an important reference for Licensed Assessors.

NABERS UK The Rules - Energy for Offices


NABERS UK The Rules - Metering and Consumption


Benefits of a NABERS Energy rating


NABERS Energy ratings form the basis of a robust sustainability strategy. They provide a fair benchmark for a building’s energy efficiency, enabling comparison across the industry.

Validate and communicate

NABERS provides cost-effective, high-trust and independent validation of energy data, ensuring confidence in reporting it publicly and communicating it simply.

Track and improve

NABERS star ratings are an essential framework for annual reporting and sustainability strategies. With annual ratings, performance improvements and reduced energy and emissions can be delivered over time.

Competitive edge

Having a building that has a lower environmental impact, lower running costs and being able to communicate that simply and with confidence gives building owners the competitive advantage with prospective investors and occupiers.

How to get a NABERS Energy rating

To get a NABERS Energy rating you need a Licensed Assessor to undertake an assessment of your building.

Training is now available, and ‘A Licensing pathway is currently being developed and the first Licensed Assessors will receive their License in September 2021.

Licensed Assessors

Estimate your NABERS rating

Two calculators are available for you to explore what star rating your building could achieve; a simple calculator and a reverse calculator. These are available in a single download below.

  • Use the simple calculator to get an idea of the NABERS rating your building may be able to achieve. Input building details and energy consumption data to generate a star rating.
  • Use the reverse calculator to estimate maximum energy use for a given star rating. Enter a target rating plus building details, energy consumption types and proportions. This will generate maximum allowable energy consumption.

Results are an indication only and may not be promoted or published.

Download both calculators here and select a tab.

NABERS UK is administered by BRE and overseen by NABERS as scheme owner on behalf of the New South Wales (NSW) Government in Australia.

For information on pricing please see our pricing page

For more information on the methodology behind a NABERS base building energy rating for offices in the UK, please read this report by Better Buildings Partnership. This report has been produced for the Design for Performance scheme.

Please note: The [Interim Ruling for Thermal Energy Systems v1.0 August 2021] replaces the Validation Protocol for Thermal Energy Exclusions, v2.0, 2008 that is referred to in the Rules for Metering in Consumption (in Section 1.5 and throughout the document).

Interim Ruling for Thermal Energy Systems v1.0 August 2021


Useful downloads

NABERS UK Reverse and Simple Calculators


NABERS UK The Rules - Energy for Offices


NABERS UK The Rules - Metering and Consumption


DfP Base Building Rating Tool