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Design variables may influence the building cost

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  i)    Plan shape If the building has a simple shape, the unit cost will be lower. This is because the simple shape has lower floor area than the irregular shape due to their large floor area. In addition, irregular shape tend to have complicated calculation and has more perimeter on the floor area. Next, the building will be more economical if it has lower wall which mean floor area ratio. However, it is not design that is practical and suitable for building function that is limited. The cost of a building will differ with changing the shape of the plan shape even the other factors remain unchanged.  In addition, if the building are built together, it will save the cost where it combine the party walls. The party wall is shared together by two unites of building. The changes in cost can be determined or can be known if the building is combine together. For example, as you can see, building A has L-shape and building B has irregular shape. Hence, assumed the ground ...