What is the property law as per muslim law if father dies intestate

 I am writing this email in reference to dispute in property share We are 2 children to my parents. My father died in 1996 & Mother recently expired in 2016. I have my parents property of 30X40 in Palace Guttahalli, Bangalore. According to Sharia Law the property should be divided as 2 is to 1, where in my father wanted to give me an equal half share . Unfortunately in the process of making a will he expired and there is no documentation of the same. I live in one of the house to have a hold on my property as per advise from my Chacha. Now when i speak to my brother about property division he says that my mother has given him the power to hold the property & he has a release order. He will give only 12 feet to me. But when calculated according to sharia Law also i should get 12.66 Feet & he does not want to give me facility of water connection etc. I need an expert advice how to go about it. There is lot of misunderstanding between me, my husband and brother.