The Green Space Factor and the Green Points System Calculate exactly how much green infrastructure should be included in a new development. This paper presents advice on how to implement the Green Space Factor, a tool for calculating green infrastructure requirements for new developments. Using this methodology gives local authorities certainty about the green infrastructure benefits being provided; developers some flexibility in what they deliver; and communities the benefits of increased green infrastructure. The tool was so successful that it has since been included in the planning policies of multiple municipalities across Europe. The Green Space Factor (Green and Blue Space Adaptation for Urban Areas and Eco Towns) was developed by GRaBS, a European partnership of 14 organisations from across Europe - including the TCPA - which worked towards integrating climate change adaption into regional planning and development. The project ran from 2009 to 2011. You can access more GRaBS resources here.