Raipur, July 26 (ANI): Chhattisgarh Chief Minister Raman Singh on Tuesday inaugurated Naya Raipur's first five-star green building, Paryavas Bhawan. Built at North Block in Sector 19, the building will jointly house the Raipur Development Authority, the Chhattisgarh State Housing Board and the State Environment Protection Board. Constructed at a cost of Rs 59.56 crore, the five-storeyed eco-friendly building has 430 rooms and six conference halls in an area of 15,000 square metre.