( 1 ) THIS writ appeal is directed against an Order of the learned single judge of this Court allowing Writ Petition No. 6211 of 1998, dated 2-11-1998 and quashing the Proceedings No. 696/p4/h/94, dated 2-1-1998 issued by the Hyderabad Urban Development Authority permitting substantial changes in the original sanctioned plan dated 19-7-1991 relating to C. S. R. Estates, Kothapet, Ranga Reddy district.

( 2 ) FOR the sake of convenience, the parties are hereinafter referred to as arrayed in the writ petition.

( 3 ) THE writ petitioner - C. S. R. Estates Flat Owners Welfare Association, Kothapet, ranga Reddy district, represented by its President G. Jagannadha Rao - filed the Writ Petition challenging the Proceedings No. 696/p4/h/94, dated 2-1-1998 issued by the Hyderabad Urban Development Authority (HUDA) permitting certain modifications and alterations in the original sanctioned plan dated 19-7-1991 in favour of the 3rd respondent (appellant-builder ). It is stated by the petitioner that HUDA notified certain residential plots, in the year 1989 inviting builders to purchase plots of 1200 square metres each, in the public auction for the purpose of building residenti