His only potential interest in the house, which is your non-marital asset, is to the extent that the value of the house has increased as a result of marital funds or efforts being put into it. You may be able to sell it without giving him any money, but he will probably have to sign the deed transferring title to your buyers. If he refuses to do that voluntarily, you will need to get a court order requiring him to do so.
Answered on Nov 06th, 2012 at 4:39 PM