The clearance inside your door is 1.5 meters high. Does it refer to the clearance from the door (from the ground to the upper sill of the door)? Do you usually not meet each other when entering and exiting the house? If so, hurry up and rebuild. According to Feng Shui theory (it is by no means a feudal superstition) it is not good if the door of the home is too high or too big, which means that the mouth is wide open. If it is too small or too short, it is even more taboo. The front door of a home is the gateway to every yard. It should be re-designed rationally to make it practical, beautiful and grand. Hope this helps.