It looks the same today. People seem to live in there or it's some kind of speakeasy. They had the door open a year or two ago while doing some construction and it looked like they had a bar inside. I'm super curious about this place, I've been tempted to go knock on the door and try guessing the magic words to get in.
I've seen some people walk in just a few days ago. I have no idea what's going on there but your theory is plausible. Good luck trying to get in.
They put up a "for rent" sign and I contacted the owner. Mystery solved: it's where they filmed Les Francs Tireurs https://lesfrancstireurs.telequebec.tv/.
Ok. That's interesting. I've never seen the show though!