Gross Perimeter
The gross perimeter is the total distance around the outside of the building either for each floor or for the building section. For multiple story buildings, combine the perimeters of each floor together to arrive at the gross perimeter. If you are dividing the building into different sections, then enter only the perimeter of the building section. See the examples below for determining perimeter.
Buildings that have the same area but different configurations, or perimeters, will have different costs. In any cost per square foot method of valuation, the costs of the exterior wall must be converted to a square foot cost. The occupancies developed for this program use the most typical building size and shape to calculate the contributing cost of the exterior walls.
As more information becomes known on a particular building, base costs can be refined to more accurately represent the cost of that building. The area must be calculated to arrive at the replacement cost of a building. If the perimeter can be calculated, this area and perimeter relationship can be used to arrive at a factor that will accurately attribute the cost of the exterior wall. The actual perimeter will always produce a more accurate value and should be used when available.
Commercial Examples
6 Story Building - Varying Sizes
1 Story Building - Irregular Shape
Agricultural Examples
1 Story Building - Irregular Shape
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