My wife and I bought a property in costa del sol in the boom times, the property is now worth approximately 250,000 euros and we owe 280,000 euros on the mortgage still, we are in our mid 60's and have only been allowed another 5 years by the lender to clear the mortgage, we cannot afford the repayments on this, we would like to keep the property for the family, is it possible to remortgage the property and add our son who is in his 40's to the mortgage, with the view to extending the number of years of the mortgage to 20 years so that it stays in the family name and the repayments will be less on it or will our son have to pay 7% tax to be added to the mortgage?

any feedback would be much appreciated