Co-Assess

Co-Assess allows base buildings and tenancies to be rated together saving time and effort, with each receiving their own certified NABERS Energy rating.

This approach gives building owners and tenants a more complete picture their energy use. It also opens up new opportunities to collaborate, compare performance, and invest in improvements.

Offices

Office tenancies can account for up to 50% of a building’s total energy use. Co-Assess brings tenants and building owners into one coordinated process, with each space receiving a separate NABERS Energy rating.

Tenants can use their rating to understand energy performance, identify areas for improvement, and reduce electricity costs. For building managers and owners, Co-Assess makes it easier to engage tenants and deliver multiple ratings through a single, aligned process. This approach supports better sustainability outcomes and simplifies the path to improved building performance.

Shopping Centres

Co-Assess for Shopping Centres measures the energy performance of both the base building and participating retail stores through a single, streamlined process. Each receives a separate NABERS Energy rating—from one to six stars—offering a clearer view of energy use across the whole centre.

By rating tenancies alongside the base building, centre managers can collaborate more effectively with retailers, uncover energy-saving opportunities, and improve efficiency.

The NABERS Energy rating assesses greenhouse gas emissions from central building services, while tenancy ratings provide valuable insight into each store’s individual impact.

Retail Stores

Co-Assess allows retail tenants within a shopping centre to receive an individual NABERS Energy rating as part of a coordinated rating process with the centre’s base building.

Your rating gives you a clearer picture of how your store uses energy, how it compares to similar tenancies, and where improvements can be made. Participating in a shared rating process can also reduce assessment costs and strengthen collaboration with centre managers on energy-saving initiatives.

Preparing for your rating

Shopping centre owners

Shopping centre owners can get started with a Co-Assess rating by following these steps:

• Engage an NABERS Accredited Assessor: Contact an accredited professional to guide the Co-Assess process. NABERS assessor accredited in both rating tools - shopping centres and retail stores can lodge co-assess ratings. Find an assessor here.
• Identify Participating Retail Tenants: Collaborate with tenants to explain the benefits and encourage participation. Obtain their confirmation of participation.
• Gather All Data: Gather energy usage data and other required data, such as trading hours, GLAR, etc., for both the base shopping centre and participating retail tenancies. If the shopping centre is on an embedded network, energy data will be easy to obtain.
• Achieve NABERS certification: The NABERS Assessor will evaluate energy performance and greenhouse gas emissions separately for shopping centre and participating retail stores.
• Develop an Action Plan: Use the insights from the ratings to collaborate with tenants on energy efficiency initiatives and performance improvements.

Retail store tenants

If you're a retail tenant joining a Co-Assess rating, share the necessary information with your building manager so they can include your store in the process:

• 12 months of past energy bills or energy consumption data
• Access to your retail store (so a NABERS Accredited Assessor can verify the layout and conduct a computer count)
• Trading hours, if they vary from core shopping centre hours.

For more pricing information, or to get started, contact your building manager or the NABERS team.