What does setback refer to in zoning regulations?

Setback in zoning regulations refers specifically to the space that is required between the lot line and a building. This distance is crucial because it affects the overall layout of a property and ensures that buildings are positioned sufficiently away from property boundaries. This requirement serves various purposes, including providing privacy, ensuring light and air circulation, and maintaining safety standards in case of emergencies by allowing access for fire-fighting and other services.

The other concepts in the question do not define setback. The distance between buildings pertains to separation requirements for fire safety or aesthetic concerns but does not relate to the boundary of a lot. The amount of green space required on a lot often relates to landscaping and open space provisions but is distinct from the concept of setbacks. Lastly, maximum height regulations deal with the vertical dimensions of structures, not horizontal placements in relation to property lines. Thus, the correct definition of setback aligns specifically with the space needed between the lot line and the building.