There have been a few condo conversions involving churches in Winnipeg, mostly in inner city areas where congregations shrank once many families decamped for the suburbs.
Here's the First Church of Christ, Scientist in Osborne Village which became a condo building some years back. From what I recall, it took forever to get it done:
Here's St. Matthew's Anglican in the West End. It was mostly converted to affordable housing a few years ago although I think there is still a church function involved:
St. John's Anglican in the North End became 7 condo units:
There are at least one or two other condo conversions, but finding pictures is a challenge. So while it can be done, it's definitely not common.