Probate will have to be opened in order to transfer the property from your mother's estate to you and your brother. This will have to be done before you can sell the property, borrow money on it, etc.
Once the property is transferred from her estate to the two of you, you can either sell it or keep it. Also, one of you can force the sale of the property by filing a partition action.
Attorney
Wills & Estates Litigation Attorney