New standards have been established in the City of Toronto Municipal Code for the display of municipal address numbers within Toronto. This by-law amendment will standardize the size of displayed address numbers so they can be easily seen from the street allowing emergency vehicles visible access that make a difference in an emergency situation. 

Naturally better visibility will be accomplished with illuminated numbers .   When your address is clearly visible from the street everyone benefits, except you may get less free pizza's.

Chapter 598 - Numbering of properties summary

Now in Toronto property owners must install Municipal numbering when posting of addresses on properties based upon the setback of the posted address from the curb.

Number sizes are based on the setback of the posted address from the curb or edge of the roadway.  Where a sign or post displays an address for a property that is closer to the road than the building, required numbers sizes can be calculated based on the setback of the sign / post from the curb and not the building.

It is the responsibility of the property owner to ensure that the address posted is of the correct size and is clearly visible  from the street.