Saskatchewan itself does not charge a separate provincial tax on the sale, and there is no land transfer tax here the way some provinces charge one. The federal capital gains rule is the main tax exposure most heirs face, alongside ordinary closing costs like legal fees and any outstanding debts against the estate.
How much tax depends heavily on how the date-of-death value was set and how long the estate waited to sell. A property that sells within months of that valuation date, at close to that value, generates little or no taxable gain, while a longer delay in a rising market increases it.
This is general information, not tax advice, and an accountant should confirm your estate's specific position. Get your hand-reviewed valuation from Joel Dyck.