Contact the estate's executor. They should arrange the sale of the home and split money among the heirs. If someone wants the house, they can be the highest bidder.
If your grandmother left a trust, a trustee should have been designated or will need to be designated. The trustee will be in charge of the sale of the house and distribution of the funds.
The trust executor will need to place the house on the market. Once it's sold, all the sale expenses will be deduted from the profit made - realtor, closing costs, etc. The ramaining balance can then be devided by the family.
This strongly depends on how the trust is set up and how the documents are worded. I would consult an attorney to get all the legal specifics for your state.
