by pqtaxation on Thu Dec 29, 2011 5:18 pm
Yes, each of you will be liable for CGT on one third of the gain between the market value in 1998 and the realised proceeds in 2011 less the annual exempt amount of £10,600 in 2011/12 and any capital improvements you (indivudually) paid for.
Quite separately, as you mother continued to live in the house (presumably rent-free) until her death in 2008 after she gifted it to you in 1998, you no doubt realised that the gift was subject to reservation of benefit and its market value in 2008 was aggregated with her free death estate on her inheritance tax account.