Overlay zoning can be tailored to local conditions, which makes it an effective tool for addressing natural hazards. Overlay zoning typically is used in areas with flood, wildfire and geologic (steep slopes) hazards. The overlay zone district is often named for the type of natural hazard it is regulating, e.g., Hillside Protection Overlay or Floodplain Overlay District. Key elements of an overlay zone district include:
- Purpose
- Applicability
- Overlay district map
- Development standards
- Review procedures
The following sections describe each of these common elements and provide standard language that can be considered by Colorado local governments. Model language is in gray shading. Commentary is located in italics in the column at the right. The model language used in this document is based on several existing ordinances from varying communities around the state, including municipalities and counties. The language is illustrative only; consult local counsel to tailor language for your jurisdiction.