1. The petitioners have approached this Court with a prayer for issuance of writ in the nature of Certiorari, to quash the Orientation Sketch issued in favour of the 3rd respondent, qua his Flat No. 38 / 2 & 4, 12th Avenue, Ashok Nagar, Chennai.

2. The Tamil Nadu Housing Board sponsored Housing Improvement and Building Schemes under the Tamilnadu Housing Board Act, by acquiring vacant sites and putting up buildings thereon, consisting of several flats. One such scheme was promoted by the Tamilnadu Housing Board in the year 1968. The acquired land was divided into parts and phases. The 11th Avenue, Ashok Nagar scheme was Part-1 and Phase-1, comprising of various plots, where a number of flats were constructed by the Tamilnadu Housing Board. The flats were constructed in such manner that the ground floor had two tenements and 1st floor would comprise of two tenements. Each was sold independently to allottee.

3. The land around the building and the terrace of the building shall be used commonly by the owners of the respective apartment of the said building. The flat bearing Door No.F4 in Block No.39 in Town Survey No.14, Block No.71 of Kodambakkam Village, 11th Avenue, Asho