18. Originally the writ petitioners are owners of 'M' block, South Boag road. But the fact remains that the entire sale is made as per the approved layout No.P.P.S.P.No./L.O./118/84, dated 28.11.1984. The cost was finalised as Rs.16,600/- per flat vide proceeding in Proc.No.S3/30178/90, dated 01.06.1990. On a careful perusal of the finalisation of the final cost, it could be seen that the cost has been fixed for 37 grounds and 2350 sq.ft. alone i.e., for the flats area and the flats have been sold. Thus, cost was fixed for the entire 544 EWS flats under the 'Mambalam Tank Bund Scheme'. The approved plan also mentions that space has been earmarked for 5 shops measuring an extent of 9 grounds 0430 sq.ft. and all along the same remained with the Housing Board. When the cost itself is fixed only for the specific area of 37 grounds 2350 sq.ft. and not relating to 9 grounds 0430 sq.ft., it cannot be said that the entire shop area would also form part of the common area sold to the flat owners.