The owners of 343 flats in four illegally constructed high-end buildings in Kochi that have been scheduled for demolition must be paid ad hoc compensation of Rs. 25 lakh within 4 weeks, the Supreme Court said today. The court said the demolition had to be completed within 138 days, in accordance with the schedule provided by the state. The court also ordered Chief Minister Pinarayi Vijayan's government to pay the compensation and recover the cost from the builder.