In Malaysia, it is common to see buildings without the 13th floor. For example, my apartment block lists the 13th floor as 12A and the 4th floor parking is listed as 3A.
I think it is because that Chinese generally believe that the number 4 means "death" and that is why they do not have the 13th floor as 1+3 = 4. In some housing estates, where it is done by Chinese housing developers, the house number 13 is sometimes known as 11A. This belief is strong among the Malaysian Chinese and you would definitely not find a Chinese living on the 13th floor or 4th floor or house number 13 or 4 or any other number which adds to 4.