A. Criteria for determining the area of the façade of a building. The area of a specific facade of a building is determined by adding the square footage of surface area of each section of wall visible from that perspective. For buildings with more than one wall along one façade, for example, rooms jutting out from the main building or a building where each floor is set back from the floor below, all of the walls are included in the total area. The total area does not include any roof area. See Figure 20.170.060-1.