On your tax return you have the option to depreciate your buildings (to claim CCA). The elements of this to consider include those below, and perhaps others as well. This is both a tax planning decision and a mortgage qualification capacity decision.

This is a good article I found on the MoneySense website

When you buy real estate you expect that, over time, it will appreciate in value. If you sell that property for more than you paid, you will have an appreciable gain in value and this triggers a taxable capital gain for the Canada Revenue Agency (CRA).

You generally pay the goods and services tax/harmonized sales tax (GST/HST) when you purchase a new or substantially renovated residential rental property from a builder. If you are the builder of a residential rental property, or if you make an addition to a multiple-unit residential rental property, you are generally considered to have made a self-supply and to have paid and collected tax on the fair market value of the rental property or addition at the time that you lease or occupy the first unit of the property as a place of residence.