Cra说:
Every time you change the use of a property, you are considered to have sold the property at its fair market value and to have immediately reacquired the property for the same amount. You have to report the resulting capital gain or loss (in certain situations) in the year the change of use occurs.
If the property was your principal residence for any year you owned it before you changed its use, you do not have to pay tax on any gain that relates to those years. You only have to report the gain that relates to the years your home was not your principal residence.
可惜 最关键的fair market value
没提供明确方法 只是含糊的说 拿到市场好好卖 能卖多少