GRILLED UP LIKE A PRISON

In Feng Shui, a house that is grilled up like the one shown in the pictures above gives the idea that the occupants of the house is like in a prison.  They will have a feeling of being caged up and their prospects might not be able to take flight. 

I think the owner put up the grills as double security to prevent thieves or burglars.  However, it might also be because of the grills that whatever success that should have come their way might also not materialise.