A height restriction is a zoning regulation limiting how tall buildings can be in a particular area, typically expressed in metres or storeys. Height limits help maintain neighbourhood character, protect sunlight access, preserve views, ensure appropriate scale relationships between buildings, and prevent overdevelopment relative to infrastructure capacity. Different zones have different height limits: low-rise residential areas might allow two or three storeys, while downtown commercial zones may permit 30+ storeys. Height restrictions interact with other regulations like floor area ratios and setbacks to shape building form. Development applications may seek height exemptions or variances, often requiring community consultation and demonstrating benefits justifying additional height. Height regulation debates reflect tensions between intensification (more housing requires taller buildings), neighbourhood preservation, and housing affordability. Some cities are reconsidering restrictive height limits that may contribute to housing shortages.