You were staying with your mother and other siblings. Unfortunately, you father expired intestate (without will).
 Firstly, is a tenated house cannot sold or transfered without land-lord's permission.
 Secondly, the house is going for Redevelopment. Since Developer does not want others to claim, he will definitely ask
for NOC of other members of family, though staying away.
 Have you got tenancy transferred in the name of your mother or both of you. There should have much of the problem.
 If not. get it transferred on your mother's name and take NOC from other sibling for mother distributing the share.
 Else, take Irrevocable Power of Attorney from Other members that she can enter into Agreement for Redevelopment and dispose of the property the way
you and your mother wanted.
 To protect your share you can take mother in confidence and make MOU.
It is certainly mix-up issue you need to take further Consulting to safeguard your interest rightfully. If so wish you may Contact on following:
ADV. JEEVAN PATIL
CONSULTANT AND LEGAL ADVISOR
For further Consulting