The following information came from
this site
Duration of the Marriage - Short Marriages
If a divorce petition is filed in a short, childless marriage (normally less than 5 years duration) it is unlikely that a 50/50 division of assets will be ordered particularly if one spouse brought substantially more assets to the marriage. Normally assets acquired prior to the marriage will be retained, or returned to the spouse who originally had them, and assets accumulated during the marriage will be divided on a 50/50 basis when the parties divorce.
Long story short, (there is more info in the link), the house is his. You had a short marriage, and his ownership predates the marriage. Even if it belongs to him, and not his father, its his. There can be exceptions to this, but from what I have read, this seems to be the prevailing outcome.