Is Chennai worth investing in real estate ?

Chennai is a thriving economic as well as cultural and educational hub. With growing employment opportunities and rapidly developing infrastructure, Chennai is becoming a lucrative investment option for real estate. 

Definitely Yes.

I would suh=ggest you Risland. 
They are coming up with a Project called The ACE of about 557 apartments in a 4.27 acre area. With *Unique Construction Technology *20,000 sq.ft of multi level landscape.