[V]

Originally Posted by jwslam

1.5m I think

http://www.calgary.ca/PDA/pd/Pages/H...ons/Decks.aspx

1.5m is only the limit if you don't have a walkout basement out the back of the house. Sounds like this guy has a walkout. So the only limit appears to be 0.3m above the grade of the main floor.