Cool house!
The teleportation function as implemented in the VR Template requires a Navigation Mesh (Nav Mesh Bounds Volume) in your level. This represent the areas you can teleport to. Did you already add one?
Once you add it, you can make it visible by pressing the P key in the editor. Scale it as needed to cover your entire floorplan. Each time you extend it, it will recalculate the areas you can teleport to. If needed you can also use Nav Modifier Volumes to block out some parts of your floor where you don’t want to user to be able to teleport to.
This said, it may still not work depending on what else needs to be re-linked, but this is a necessary first step.