"There are large-scale scams in the drafted and approved master plans of around 15 cities and granting of permission for change of land use of more than 20,000 acres of land across the state," he said
Singh, speaking here after inaugurating the office of his newly-floated social organisation 'Insaf Munch', demanded a review of these decisions in the interest of the state.
Singh further said the state government had only done "lip service" in the granting of 25,000 acres of land in Gurgaon and Jhajjar to a private company for development of Special Economic Zone.
Singh said he would ensure probe into all the "scams" that took place in the state, including the DLF land deal, if he becomes part of the next government in the state.
Singh said he is also among the persons who are afraid of CBI as it is being controlled by Central government, but stopped short of commenting when asked whether the agency was being misused by the Centre.