Your siblings could file in court for an "injunction". This is a court order that orders a party to do or refrain from doing a certain act. They could then file for a "partition" action, which means the division of property among co-owners. Pursuant to such an action, if a property can be physically divided the court will so instruct. However, if division is impracticle or other wise not practical (e.g. due to zonig regulations) the court will order a "sale in lieu of partition" wherein there would be a sale of the property and an equitable division of the proceeds among all co-owners. However, before a sale the court would permit one co-owner to purchase the interest of the remaining co-owner (at fair market value).