So, I am reading this as he bought this house before you were married. I was a similar situation, only I bought my house before I married my ex. He was only entitled to 1/2 of the rise in equity from the day we married until the day he moved out. I would definitly consult an attorney, though. If you were helping pay payments even before the marriage and your name is now on the deed (my ex’s wasnt) then you might have more claim on it.