Most expensive homes are owned by holding companies.    No need to register sales just transfer ownership of shares,  Government is complicit in that they have done nothing of substance to reign in overheated housing.  Rapid inflation always leads to rapid deflation.  The bubble bursts and the shock wave will be felt throughout all the rooms of our economic house of cards.  Very little money is put down on purchases and the banks are willing to lend money.  No risk on their part as long as the buyer buys mortgage insurance from the Canadian tax payer (CMHC)