Does that include the overhanging eaves?
When I was contracting, it was the footprint of the building only (in Calgary).
You will have to work closely with the Planning department in any event, and they will scrutinize your drawings thoroughly. They are all nice guys until they are convinced you are doing something shady. There are also 2 firms in Calgary that deal with the process of getting through all the red tape.
Caveat: I've never used them. One of my neighbours has, and I'm very uneasy about recommending them.
If you have a general contractor, he will take care of all this, for his fee, of course.
Second modifier: Variances can be had for a reasonable fee, but the process takes about 6 months longer. They will assess the neighbourhood context and put forward the variance to council. Almost every teardown/rebuild in my neighborhood has had at least one variance...