CG73617 - Dwellings subject to ATED: relevant high value disposal: condition A - chargeable interest
Condition A for a disposal to be a ‘relevant high value disposal’ is that it is a disposal or a part disposal of a ‘chargeable interest’. A chargeable interest for capital gains tax purposes is whatever a ‘chargeable interest’ is for ATED purposes. Broadly, it is any interest, right or power in or over land in the United Kingdom.
For a full explanation of what is a chargeable interest, see for additional ATED guidance