As I understand it, the fair deal scheme is not dependant upon having a family home. Each person is assessed based on their needs and assets. If you have a share in a house, then that is part of the assessment, and is taken into account towards what you can pay for your care, along with your income and liquid assets. In order to be realistic, the fair deal scheme allows you to defer paying any portion of the bill that is based upon the calculation of the value of the family home, and instead, they register an interest in the home (up to a certain maximum %, I think 22%). So if your mother has a % interest in the family home, that must be listed as an asset, and I'm guessing, some decent proof that this is the case. If your father has no ownership of the house, then there is no charge for him to pay on that - just his other assets and income. You will of course have to prove to the HSE people that your father has no ownership of the family home.