The property left behind by your deceased grandfather, upon his intestate death, shall devolve equally on all his legal heirs namely, his wife and all children including the children of his deceased legal heirs.

Just because your grandmother is residing in that house property, it will not become her own property.

If the legal heirs decide to transfer this property to one of the grandsons or any third party, all the legal heirs may execute a registered transfer deed jointly in favor of the chosen grandchild.

The transfer may be by gift deed or by a registered sale deed. 

No relinquishment deed would be applicable in this situation.

It is advisable that all the legal heirs can execute a registered sale deed jointly in favor of the chosen person to avoid all future complication/litigation/dispute. 

As per Hindu Succession Act, Class I heirs list all grandson are legal heirs, so first you need to do relinquish deed. and get the property transfer on your name. 

On grand father demise grand mother , 3 sons would inherit his property 

2) you need signature of alll sons to register property solely in name of one grandson 

Signature of all the adult legal heirs is required. You can purchase their shares. After payment they can register a release deed in your favor or all can execute a partition  deed. Stamp duty for both is fixed at Rs. 1000/- and registration  charges are 2% of the government  market value .

 Dear Sir,

1) As the property belonged to grand father who passed away interstate the grand mother and all children will be equal heirs of the property through succession. Unless the property has been muted by NOCs in favor of the grand mother.

2) The Signature of all the legal heirs ie sons and grand mother will thus be required to transfer property in name of the grand son.

3)Execution of a registered sale deed will be best option for clear title, with not future legal issues.

Thank you

- As per law after the death of grandfather intestate , his property would be devolved upon all legal heirs equally i.e. each legal heir will have 1/6 share in the property including grandmother . 

- Further, any of the legal heirs can release their respective share in the name of other legal heir after executing a Registered Relinquishment deed. 

- Further, if all legal heirs wanted to transfer their respective share in the name of grandson , then they can  execute a registered Gift deed in his favour . 

- Hence, all legal heirs signatures are needed legally for registering the property in the name of grandchildren.