DEAR PRASAD,
Rightly suggested by our learned brother, Mr. Bhatia, Your father can file a ' CIVIL SUIT ' for ' PERMANENT INJUNCTION' along with an ' Interim Application ( I.A ) ' for an " ad - interim injunction order " against his brother and sister OR remaining owner residing in the premises in question, to restrain them from dismantling the Premise.
But, for me your question is neither clear nor complete one on some issues, for further response by our learned brothers please provide details for the following:
( a ) Whether the Will in question is a ' Common Will ' for all ( Two Sons & Daughter) ?
( b ) If the Will in question is common one, whether is it mentioned in that, about ' Proportionate Right on Land ' for other Legal Heirs except your Father ?
( c ) If, the Will in question is for your father only, then, what is the other docoment, the remaining heirs of your Grand Father are possessing ?
( d ) You are not clear, about shares to the other heirs of your Grand Father ?
( e ) What about your Father, is he ' Alive ' ?