Green Star NZ is New Zealand’s first comprehensive environmental rating system for buildings. Green Star NZ – Office Design v1, is used to assess the environmental impact of offices. It was released in April 2007 after extensive industry and public consultation. Green Star NZ evaluates building projects against eight environmental impact categories, plus innovation. Within each category, points are awarded for initiatives that demonstrate that a project has met the overall objectives of Green Star NZ and the specific criteria of the relevant rating tool credits. Points are then weighted and an overall score is calculated, determining the project's Green Star NZ rating.