Sorry for the double post, but I joined a public server and found the house just near the hospital at Berizino (I believe) - I move back to the area in the video I uploaded to Youtube at the end so you can know which house I tried it in, but it seems to work in any house. I think before when I tried this, I had a gun out so my animations were perhaps different than when I was carrying a hammer in this video so it seemed a lot harder to replicate with a single handed item.
Youtube (link will be active shorlty once it's uploaded)
https://www.youtube.com/watch?v=cht5CjMMG5s&feature=youtu.be
What seemed to work best is trying to get the player to clip into the bed or sideboard and then from that point it let me walk through the wall, I believe this is an issue with the Roadway LOD for the building as there appears to be a gap at this point in the structure where this room has been added, which seems to cause the game to place you on the ground below the building which then either allows you to roam around the structure or it warps you to the closest unobstructed area. It takes me at about the 1 minute mark to get a really good example of what I mean.
I can post a picture of where I found the roadway gap from within Oxygen 2 if this helps but I'm sure you will be able to spot it once the model is open in the editor.