Since it came up in a discussion elsewhere, the restrictive covenants thing is not at all new in Edmonton. At all.
Here's a story I wrote nearly a decade ago in The Globe and Mail about the idea taking root here: www.theglobeandmail.com/real-estate/...
www.theglobeandmail.com
The city’s drive to densify Alberta’s 1960s-era suburbs has hit a wall built of restrictive covenants