For mutation you need to fill up a prescribed form A-42, annex.the copy of sale deed along with A-42 form along with No Outstanding Certificate' from Assessment Collection Department and the form along with documents needs to submit before.the municipal office. Om satisfaction they will mutate the name in records.
Based on your sale deed and NoC and other requisites in the Form the mutation of property shall be done in your name.
legal heir certificate is not necessary unless sight for by revenue records