CGT Inquiry for property sale in USA

Many years ago, my grandfather purchased a holiday home in the USA which was passed to my mother when he died. I am a former USA citizen who is domiciled in the UK and a UK citizen. Before my mother passed, she put the house in mine and my brother's names. That house is now being sold and my share will be sent to my bank account. How would I calculate the gain (from when our names were added to the deeds?) for my share?

Hi.

You would need to obtain the market value of the property at the time you acquired it, names added to the deeds, and convert this to pounds sterling, using a just and reasonalble exchange rate in use at the time.  

You would take your share of the disposal proceeds, converted to pounds sterling, using a just and reasonalble exchange rate in use at the time, and deduct your share of the market value of the property at the time of acquisition. You also deduct your share of the costs, such as solicitors fees, estate agent fees and so on.  

What you are left with is either a gain or a loss. Any gainst should be declared in a Self Assessment tax return. Any losses can be claimed either in writing to HMRC, including supporting evidence or in a Self Assessment tax return.

Thank you.