I had similar sentiments when I visited the site over the weekend. The old blocks located right to the south of CSC are very old and even their lift has not been upgraded (it does not stop on every floor). Maybe someone who lives there can give us a heads up on whether that cluster has been selected for any upgrading programme (whether lift or main etc.).
Went back to check on the HDB website and the lease for those blocks commenced back in 1979. So that makes them about 33 years old...those who are intending to select units facing the south might want to take this into consideration. Hope this helps!![]()
Who knows, it is possible, before 5 years completion, you hear news those old hdb flats will be select for en-bloc and replace with new 30-storey hdb flat. But if you choose facing North, it is already NOW blocked by four 30-storey park central hdb flat.

I think yishun sobf not near to mrt..and fengshui nt gd advice dnt take up