Capital Gains on Sale of Garden of Main Residence

I am developer purchasing part of the garden of somene's Primary Private Residence. They have lived in the property for 17 years. I am I correct is assuming that no CGT will be due by the vendors if they sell part of their garden to me.

Hi David,
If their garden meets the requirement to qualify then no.
They should refer to:
HS283 Private Residence Relief (2024)
Thank you.