Zoning By-law is used by local government to regulate the use of land such as residential, business, commercial or industrial use. Also, it regulates the building height, density, size and other characteristics.
Each city has its own zoning by-law which can be changed. Homeowner and business owner should be aware of the updated by-law and make sure not to violate it.
This video will tell you where to find the New Toronto Zoning By-law and how to use the zoning maps.