Relief from an Immovable Obstruction
Immovable obstructions are artificial objects that are on the course for a good reason but aren’t meant to interfere with the playing of our game. These include things like pump houses, electrical boxes, bathrooms, etc. If an immovable obstruction interferes with your lie, stance and/or swing then you’re eligible for free relief.
This video explains it fairly well click here.
1. You are entitled to free relief of 1 club length from the closest point of relief if, and only if you ball is lying in or on the obstruction, or if the obstruction interferes in any way with you swing or stance.