Police said Shankararaja, a resident of Eachanari area here, posed as a Government official and took money from gullible persons promising to allot them the flats.
Following several complaints, police launched an investigation and arrested him along with his two accomplices late last night
Shankararaja reportedly told police that he had taken money from 90 persons, ranging from Rs50,000 to Rs five lakh, amounting to rs 1.5 crore.
Besides he has helped a relative set up a water service centre, police said.
Investigations are on about other properties purchased by Shankararaja and of others helped him in the crime, so that those got cheated could be given the money back after attaching the properties, police said.