You did not indicate which state you are located in. Still, in a community property state or an equitable distribution state like New York, you would be entitled to approximately one-half of the house’s value, and your husband would not have a right to ask you to leave. If you purchased a house while you are still legally married, your husband would have an interest in such house.
You should wait until you have entered into a legal separation or filed a summons and complaint for divorce before you purchase any additional property.

I strongly suggest that you consider mediation to settle your separation and divorce, and if you are located in the New York City metropolitan area, please call me at 212-370-1660.

Leonard M. Weiner, ESQ /Divorce Solutions