If the home was the deceased's principal residence for every year they owned it, the principal residence exemption typically shelters that gain entirely, so the estate often owes little or nothing on the deemed disposition itself.
What you owe personally as an heir comes later and is usually small: a second, separate capital gain measured only from the date-of-death value to your eventual sale price, which is often modest if the estate sells within a reasonable window of the death.
Selling costs still apply regardless of the tax result, including legal fees running roughly $800 to $1,500 and a negotiable commission that comes off the top before net proceeds are calculated. Get your hand-reviewed valuation from Joel Dyck.