In Canada the Realtors have centralized their lisings and home information their Multiple Listing System, now on a site called Realtor.ca.
While individual real estate Boards, in different communities, may choose to opt-in or have their own system & web site.
This information is on a single website, but requires multiple steps to "drill-down" to the particular community or neighbourhood in qhich you are home shopping.
Commentary on Using MLS /Realtor.ca
We have included some fast links so everything at a glance you need for looking at a city's real estate listings:
St Johns *