How far the tower is from the building does not affect the geomantic omen of the house? Can the door of the house face the tower? Can the windows and balconies of the house face the tower?

This has no specific value. Generally, as long as you don't see directly, something (such as a building) can block it, but the door can't face the tower, nor can the window and balcony. If you can't avoid it, just point the mirror at the tower, or the eight diagrams mirror can do it.