i used to live close to demonte colony. in the 1950s, 60s it was developed by (i think) easun engineering company. for its management staff. small cute stand alone bungalows with colourful gardens and a car in every drive way (at that time, this was a wonder)!
i happened to see it recently and asked a few people around. apparently the marans or some other powerful family has seized it and intend to develop it for commercial development, the location being prime south madras. whatever the reason, that is not progressing, and all these rumours and haunted stories are now floating around.
incidentally there is a girls' school just a stone's throw away next to it. and boston matriculation on the other side.