Wall signs in business and manufacturing districts are limited to 10% of the building facade, up to 22 feet high. This means that when calculating the square footage of the building facade (width times height), if the building is taller than 22 feet in height, anything over 22 feet in height does not count towards the calculation.
Windows and doors do not need to be subtracted from the calculation, and the height calculation is measured from grade. There is no limit to the number of wall signs, as long as the total permitted square footage is not exceeded. Wall signs are permitted to be placed on any facade, and each facades permitted square footage is calculated independently of the others.
Signs are not permitted to cross or cover windows and door frames, and may not be placed on the roof of structures, otherwise the placement of wall signs is not restricted.