1) If there is no way to go back and anyone read sunnat and naft at same place where he read Farz Namaz then is it permissible? 2) If a person read Namaz in home or as Munfarid (in mosque), is it necessary for him to change place after performing Farz Namaz?
Answer
It is not necessary to change places after the Fardh Salaat in order to
recite the Sunan and Nawaafil Salaats. One may recite his Salaat in the same
position, however, it is preferable to change position. (Aalamgiri vol.1
pg.113)
and Allah Ta’ala Knows Best
Mufti Ebrahim Desai