Rajiv Sahai Endlaw, J.

.1. The plaintiff No. 1 claims to be an Association of the occupants of Guru Ram Das Bhawan constructed by the defendant at Plots No. A3 & A4, Community Centre, Ranjit Nagar, New Delhi. The plaintiffs No. 2 & 3 are the President and the Secretary of the plaintiff No. 1 Association. The record reveals that the Delhi Municipal Corporation on 11th March, 1979 held a public auction in respect of perpetual lease hold rights of the aforesaid plots of land and the bid of the defendant was highest and was accepted and the defendant was put into possession of the said land on 19th July, 1979. The defendant constructed on the aforesaid plots of land a Multi Storeyed Building with a number of offices, flats, shops and godowns. The said building was named ‘Guru Ram Das Bhawan’. The defendant entered into separate agreements with different persons regarding the offices/flats/shops/godowns in the said building and agreed to sell the offices/flats/shops/godowns in the said building to the said purchasers on the terms and conditions contained therein.

.2. As per the documents on record, it was inter alia agreed between the defendant and the purchasers of the differe