Peter D wrote:What was the property being used for when you did not live there.
Does it matter? ... as even if not let -and so no lettings relief- there is no CGT payable on OP's 50% interest .
But disposal is reportable (£137.5 *50%) by OP and by co-owner (if only one)
Owned May 2004 to Nov 2010 = ~78 months.
Period May 05 to Nov 10 covered by main residence (PPR) relief (last 36 months allowance covers Nov 09 to Nov 10 period when OP did not reside there)
So only 12 months May 04 to May 05 not unrelieved
Total gross gain of 50% interest = 50% of ~£30k
Unrelieved gain = 12/78 of 50% of 30k = ~ £2.3k
Which unrelieved gain is well below annual exempt amount