Market value determination for CGT on property sold to family member

Hi If i wanted to sell an inherited property, which is not my primary home/property, to a family member I understand i would pay CGT on the difference between the value of the property when inherited and the market value of the property now, regardless of whether i sell at this market value or below. What evidence does HMRC require of this market value? How does HMRC check/determine market value? Thanks

Hi EK86,
You would need to have 3 different valuations  done by estate agents and take an average.
Thank you.