Gauge was appointed the Sustainability Technical Adviser to Department of Environment for their Public Private Partnership (PPP) HQ building in Pretoria. Gauge was responsible for advising the client on sustainability aspects of the project and for drafting the sustainability specifications that formed the PPP Agreement. This legal agreement included stringent sustainability criteria which have been reflected in the design.The building was the awarded the Highest Rated Green Building by the Green Building Council of South Africa in South Africa in 2012/2013. The building is carbon positive at weekends when the energy generated by the renewable energy systems exceeds consumption within the building.