Define "setback" in the context of site planning.

In the context of site planning, a "setback" refers to the required distance between a property line and a building or structure. This distance is crucial for ensuring that buildings are positioned appropriately on a site, providing space for various purposes, such as safety, privacy, light access, and aesthetic considerations. Setback regulations help to maintain uniformity and order in neighborhoods, protect the views and sunlight of surrounding properties, and contribute to the overall character of the built environment.

The other choices provide definitions related to site planning but do not accurately capture the essence of what a setback entails. The specification regarding distance from a road to a property line describes another aspect of site development but does not reflect the broader definition of setback as it relates specifically to distances from all property lines. Height restrictions near roads pertain to different zoning and planning considerations, primarily concerned with maintaining visibility and safety for transportation. Lastly, the area designed for green space relates to landscaping and ecological planning but does not define setbacks, which are specifically about the positioning of built structures in relation to property boundaries.