Can I sell property which is in father's (expired) name.

If the plot was not transferred to any one then all of you need to mutate your names on the record of that plot/building. After that you will be able to deal with the promoter or If the promoter agrees you can directly deal with him by executing an affidavit.

You have not exact date of your father's death given.If all agreed to sell or release rights to promoter.Then mutation in regard to succession have to be carried out. Then all legal heirs name mutated on record.Then you have to take power of attorney in your name or any other name as per your wish. And income proceed shall be written in power of attorney to whom and what percentage shall go.

Mam,
1. Check is there any will made by your father.
2.If no then make testamentory application before honorable court wherein you need to disclose all your movable and immovable property and as well as all legal heirs. Once court pronounce its verdict, thereafter execute testamentory certificate and same need to be dispatc before appropriate housing developing authority such as BMC or Mada and then you can put forth your word with promoter regarding above said concern.