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Co-Assess for Business

What is Co-Assess?

NABERS Co-Assess is a process that enables businesses to get NABERS ratings, alongside the base building and/or whole building energy rating. The tool has been designed to help building managers, building owners and tenants/businesses to better understand their energy use and work together to improve their performance.

You can find out more by watching the video below:



The energy used by office tenancies can account for around 50% of the total office building’s energy use. NABERS has designed an application process that allows tenancies/businesses to be rated alongside the base building and/or whole building energy rating. This application process is called Co-Assess. The easiest way to get your tenancy rated is to contact your building manager and ask to participate in a NABERS Co-Assess application.

As a tenant, you can use the information provided by a NABERS rating to easily understand the performance of your office space and from here, find opportunities for improvement and save on electricity costs.

For more information about the Co-Assess process, consult our NABERS Co-Assess for Tenants/Businesses fact sheet.

Building Managers and Owners

Undertaking a Co-Assess rating can help you better engage with your tenants and increase the level of service by offering one streamlined process for multiple ratings at the same property.

For more information about the Co-Assess process, consult our NABERS Co-Assess for Building Owners and Managers fact sheet.

Preparing for your rating

As an office tenant, if rating through the NABERS Co-Assess process, you'll need to provide the following information to your building manager:

  1. Preceding 12 months of energy bills or energy consumption data
  2. Access to your tenancy (so a NABERS Accredited Assessor can verify the layout and conduct a compute count)

For more information about pricing, or to get started, contact your building manager ornabers [at] environment.nsw.gov.au ( the NABERS team.)


Free ratings

This year NABERS is providing financial relief to sectors heavily affected by COVID-19.  As such, we are waiving the NABERS fee for ratings lodged between 1 July 2020 and 30 June 2021 for offices and office tenancies under 1000m2.  This is applicable to following ratings under co-assess:

  • Energy
  • Water

The NABERS fee waiver will automatically be applied when an Assessor lodges a rating.  Find out more about pricing and the conditions of the offer here.  Please note the Assessor fee will still be applicable and will vary depending on the size of your building and complexity of the metering. 

Note: Offices and office tenancies under 1000m2 also have access to NABERS Waste and NABERS Indoor Environment ratings fee-free, although this is not available under the co-assess deal.

For any queries please email nabers [at] environment.nsw.gov.au, or speak directly with your Assessor contact for any queries. 

Don't have an Assessor yet? Find a NABERS accredited Assessor here.