GBCSA / Certify / Green Star Certification / Existing Building Performance

Existing Building Performance - Green Star Rating Tool

Assessing the environmental performance of any existing building in operation.

The Existing Building Performance (EBP) Tool covers the same environmental categories addressed in the Green Star New Building Tools but the focus is directed on the operational phase of building’s lifecycle. This is  to ensure that the operations and management of the building are efficient in order to maintain optimal performance.

This tool is designed for optimising the operations and performance of any existing building. The rating is valid for a period of 3 years in order to ensure the building is continually well operated and maintained. The ratings given for this tool are from 1 to 6 stars, understanding that existing building performance is a journey of continual improvement. 

Items such as energy and water monitoring, management policies and plans are some of the initiatives that can be adopted to as part of an operational strategy to achieve the rating. The tool also addresses the relationship between landlord and tenants, setting up a win-win situation with the Green Lease Toolkit.

A key component of the energy & water categories of the Existing Building Performance Tool for offices is the Energy Water Performance (EWP) tool.

Currently available for Office buildings only, this free tool allows you to compare the energy and water performance of your building against industry benchmarks. It allows existing building owners and/or portfolio managers to easily benchmark their properties in terms of energy & water performance, informing key investment decisions. 

The EWP is 40% to the Existing Building Performance Certification but is available as a separate certification of energy and water performance.

We also have a custom version of the existing building tool for major tenants called Existing Building Performance – Major Tenant, this rating tool is used for major tenants occupying existing buildings that want to certify their spaces. Major tenants will need to have control over the building services and able to influence management policies.

Building Types & Available Ratings for this Tool

This tool caters for a broad range of commercial buildings including office buildings, retail buildings, public assembly buildings.

This tool also rewards a journey to World Leadership and recognises all 1-6 star ratings.  

  • 1 Star“On the journey to a better, greener building”
  • 2 Star“On the journey to a better, greener building”
  • 3 Star“Good Practice”
  • 4 Star“Best Practice”
  • 5 Star“South African Excellence”
  • 6 Star“World Leadership”

For a full list of building types considered download the ‘Eligibility Criteria’.

Supporting Information & Resources

Certification Fees

Project Area GLA Member Fees (Incl. 15% VAT) Non-member Fees (Incl. 15% Vat)
<4 999sqm R73570.00 R95819.00
5 000sqm - 19 999sqm R81440.00 R107730.00
20 000sqm - 69 999sqm R90650.00 R122100.00
>70 000sqm R99870.00 R133889.00

*All fees are valid for 2024 and will automatically increase on 1 January 2025.

1 & 1A Protea Place

Johannesburg, Gauteng, South Africa
Existing Building Performance Tool v1

Certification Process

Once you have selected the tool and met the criteria you need to register your project via GBCSA Certification Engine. You will need to create a new profile if you do not have an existing one. Your account is valid for a 12 month period from activation to close out / final results.

Find a Green Star AP

An independent Green Star AP must be appointed by the project developer at market related rates to collate and submit the documents to GBCSA for review and certification. 

Green Star AP are third-party professionals whose fees will be directly negotiated with the project developers and not set by GBCSA.

Register the Project with GBCSA for Green Star Certification

In order to register the project you will need all the project and client details. A draft pro-forma invoice will then be generated and sent to the client & AP for verification. This is followed up by an official pro-forma invoice.

All further information is then channeled through the certification engine and the assigned GBCSA case manager for your project. 

Once payment has been received and a signed certification agreement been uploaded to the engine, the project is considered fully registered and can be marketed as “aiming to achieve x stars”.

Collate & Submit 1

Project documents are reviewed and submitted by the Green Star AP to the GBCSA.

GBCSA Assessment & Feedback

The GBCSA reviews and provides feedback on project documentation. If the minimum 20% Standard is achieved on all three categories, the GBCSA will issue a preliminary design certificate (that will expire in two years’ time from this date).

Collate & Submit 2

Round 2 allows for  practitioners and building owners to provide more information or make limited amendments to their submission.

Project Green Star Certified

A certificate is issued to each certified project for both preliminary and post construction phases in order to publicly display your hard work!

Join the next Existing Buildings AP Programme

Learn how to apply this tool

Sign up for the next Existing Building performance AP Programme

Tool Sponsor

The development of this tool was proudly sponsored by Nedbank Corporate Property.

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