As long as the house was purchased during the marriage it's considered marital property . This is from the Missouri revised Statutes .

3. All property acquired by either spouse subsequent to the marriage and prior to a decree of legal separation or dissolution of marriage is presumed to be marital property regardless of whether title is held individually or by the spouses in some form of co-ownership such as joint tenancy, tenancy in common, tenancy by the entirety, and community property. The presumption of marital property is overcome by a showing that the property was acquired by a method listed in subsection 2 of this section.

http://www.moga.state.mo.us/statutes/C400-499/4520000330.HTM