1. In Panchayat area also no pucca construction is possible without a valid sanctioned plan issued by the Panchayat.
2.SO check once whether the builder ahs got pepr sanctioned plan to raise these additional floors.
3. if yes then you could enjoy the open area on roof of the additional floor.
4.however of this construction violates the terms of your sale deed even if there is sanctioned plan you cna challenge the same through civil court remedy.
5.Since civil case takes time I would advise to file case beofre the consumer forum only for removal of the additional structure which is made beyond the terms of the deed.