Do you mean Oshawa? By downtown connectivity are you referring to Go Transit or the 401? We were looking at Markham but I shudder at how I'll get to downtown except by Go. DVP is a disaster. Thanks in advance!
By Durham I mean Pickering, Ajax, Whitby, Brooklin, and Oshawa.
GO trains are every 10 minutes during rush hours and every 30 minutes at all other times. Trains start at 4/5 am and go until 1am.
Markham does not have that level of connectivity. There are only a couple trains that run in the morning and then a couple in the evening. It is serviced by buses at other times.
Real estate prices wise, for what you pay for a town home in Markham, you can get a full detached home in Pickering...and it's only like 15 minutes away from Markham.