The court ordered to demolish the illegal buildings, constructed by Amrapali and Supertech groups, within two months and to get the land cleared of all constructions within the fixed time limit.
Amrapali building is located on a land of a pond in Ithaca.
The HC has also ordered demolition of a building of Supertech on a cremation ground in Patwari village.
These projects are spread over 43,000 square metres of land.
Various group housing societies are likely to be affected by the HC order while the investments of thousands of people is likely to be jeopardised.