How much time will a Partition suit take to be executed muslim law

My grandfather had 3 properties in Mumbai and 2 in Gujarat. He expired and now there are 3 parties claiming i.e my mother(as my dad expired), his brother and his sister. My uncle transferred one of the properties to his name before even asking us. And other properties yet remain in my grandfathers name but they're not willing to settle. How long will the suit last? What will be the cost for it? Is there any alternative way through mediation? This question has been asked keeping in mind that we're Muslims.