Prestige, Rattha plan townshipBS Reporter / Chennai July 19, 2010, 0:13 ISTThe Prestige Group has joined hands with Rattha Group in Chennai to develop an integrated residential township project at an outlay of around Rs 1,000 crore.The proposed project will be spread over 25 acres in prime Porur area here, and will have a built-up area of 4 million sft.