Neutral Activated Abilities

A timing question on when Neutral Triggered abilities happen? For example, entering a building triggers when a Model moves within 1" of the door. This rule is on the building, not the model moving.
So, in the event that you have a Feat, like Scryafeal’s, which triggers at the end of enemy movement, when does the building trigger happen?

Entering is the active players decision, even if it isnt on the active players model. After all, the guard tower isnt deciding whether or not you enter it.

Sure, but the timing rules only talk about rules on a model.