It's either 480,000 units from your numbers, or the Prime Minister's number from question period on December 15, 2021, of 100,000 units.
Let's go with your number. It's a higher number that works slightly more in your favour. Scotiabank has indicated that you need 1.8 million more homes right now. Regardless of whether it's 400,000 units or 100,000 units, you're a lot of homes short.
What are you going to do urgently? It will be extraordinarily difficult to get this many homes built in the timeline that Scotiabank has indicated.