1) it is self acquired property of grandfather your mother has no share during grandfather lifetime

2) only if grandfather died intestate can your mother claim one third share in property

3) your uncle has no share in property as on date

4) your grandfather can execute sale deed for one third share in property in your favour

5) out of sale proceeds grandfather can give money to uncle and he can deliver vacant possession of second floor in your favour

6) your grandfather is at liberty to bequeath property in will to whomsoever he desires

7) your grandfather can execute gift deed of one floor of house in your mother favour

If the property is decided to sell, then better you have to purchase it own your mothers name. Legally the grand mother is the owner of the property then she can sell the same to any person as per her wish.Only after the demise of grandmother, her legal heirs can claim the right over the property.

Otherwise she made a gift deed in favour of your mother and also incorporated a condition for life estate of grandfather and grandmother in that gift deed. The clause of life estate protect their living right over the property up to their life time(clearly mention it is on ground floor). The same time you may also take NOC from your uncle which may strengthen your protection from unnecessary litigations.

Will deed and other way of documentations are not advisable in present condition.

Firstly you must be aware of the legal fact that the house belongs to your grandfather and during his life time nobody can force him to transfer his property or even make a partition and allot any share to anyone. He is the only and absolute owner hence he can do only whatever he feels right.

Now in this family arrangement, if your grandfather is okay to allot your mother her share, first you get it transferred on her name by a settlement deed registered on her name. As far as your paternal uncle's share, if he is ready to sell his share, you may buy it on your name, please make sure that you should acquire it only through a registered sale deed and not by any other mode of transfer namely, settlement or gift deed or will etc. These are liable to be disputed at a later stage and you may have to run behind the litigation unnecessarily.

Since your grandfather is adamantly refusing to transfer his ground floor share now, dont agitate his decision, he may be sentimentally affected and the impact may be more adverse, hence allow him to devolve on his own decision without objecting to it. If he is saying that he may bequeath the property by a will in your mother's favor, wait and watch the developments. You should not make this as a destination, especially if this property has to come to your family nobody can stop you from acquiring them, so allow things to happen in the legal way for the present.

1. Your grandmother is the owner of the property. So during her lifetime she is at liberty to make a will to devise the manner in which the property shall devolve after her lifetime. None of her heirs has any share in the property during her lifetime. If she desires she can bequeath her entire property to a beggar she finds on a street. If she dies intestate her property shall devolve through succession on her heirs i.e widower and children. The share of predeceased children shall devolve on their heirs. So your deceased father's share will devolve on his widow and children equally.

2. During your grandmother's lifetime she can divide the property through a partition deed among the legal heirs. She can also sell the property to divide the sale proceeds in the manner she desires.

3. Any legal heir is at liberty to execute a relinquishment deed to relinquish his/her share in the property.