Establish urban greening factor requirements for new developments that quantify how projects contribute to urban greening for reduced stormwater runoff and urban heat island improvements.
Vegetation and green space help to reduce and/or slow stormwater runoff (and therefore flooding) and can reduce urban heat islands, provide wildlife habitat, and provide other social and environmental benefits. The City will establish urban greening factor requirements for new developments around rainwater infiltration that will ensure a minimum level of runoff reduction and “greening” is achieved in the city. Guidance will be provided around the range of urban greening options are available, such as planting street trees, installing green roofs, or incorporating rain gardens; each has a different greening factor based on its potential for rainwater infiltration. The City will partner with stakeholder groups, including neighborhood organizations and the development community, to define urban greening factor thresholds for different project types (e.g., residential, commercial).