Property inherited by a Hindu from his father, father’s father or father’s fathers’ father, is ancestral property. The essential feature of ancestral property is that if the person inheriting it has sons, grandsons or great-grandsons, they become joint owner’s coparceners with him. They become entitled to it due to their birth. Coparcener. One who shares (equally) with others in inheritance in the estate of a common ancestor.
Coparcenary property means and includes: (1) ancestral property, (2) acquisitions made by the coparceners with the help of ancestral property, (3) joint acquisition of the coparceners even without such help provided there was no proof of intention on their part that the property should not be treated as joint family property, and (4) separate property of the coparceners thrown into the common stock.
To be more clear about ancestral property and the rights as a coparcener:
The property of the great grandfather falling into the hands of three generations without partition or any mode or alienation in between then the fourth generation male members become coparceners of the property which is called as ancestral property and they can claim their rights in it by birth.
If the above convinces you, then you may ascertain your position and deservance to claim a share in the property after which you can decide about claiming your legitimate share, if any, legally through a lawyer and by entrusting the job to a general power of attorney agent to look after the same during your absence in the proceedings of the case.
The costs can be enquired from the lawyer who you would be proposing to engage.