So far, 561 houses in different areas of the town have developed cracks, including 153 in Ravigram, 127 in Gandhinagar, 71 in Manoharbagh, 52 in Singhdhar, 50 in Parsari, 29 in Upper Bazar, 27 in Suneel, 28 in Marwadi and 24 in Lower Bazar, Joshi said.