My parents own a second house which they inherited over 10 years ago. They want to add the names of my sister and I to the house. The house is currently valued at approx €250,000. I have joint tenancy on another house with my partner. My sister doesn't own any property. What are the tax liabilities and legal costs that all parties are likely to incur. Can one party then release equity from the house through a mortgage with the agreement of the other parties or do all parties to the deed need to be on a mortgage? Thanks C