Private residence relief prevents or reduces capital gains tax being payable from the sale or transfer of a property that’s been your home for all or part of the time you owned it. The once simple rules for this relief have become increasingly complex so care is needed before assuming the relief applies.
The Flow Chart - Capital Gains Tax Private Residence Relief will help you decide if you are entitled to at least some relief.
Definitions for the flow chart:
HMRC provides a comprehensive helpsheet at https://www.gov.uk/government/publications/private-residence-relief-hs283-self-assessment-helpsheet
Where you establish that you are entitled to private residence relief our documents may help you with quantifying and making your claim. These are the Claim for Private Residence Relief to Apply to a Former Home, Nominating a Main Residence Election and Non-resident CGT Charge Election.