A construction contingency is the amount of money allocated to pay for additional or unexpected costs during the construction project. Typically, a calculation of 5 to 10% of the construction budget should be allocated to your construction contingency. Contingency is an amount of money built into the contractor's price to complete the project and address the unforeseen (though sometimes very common) costs that arise. This sum of money is generally known as the contractor contingency.
The amount of the contingency is a balance between having money on hand to deal with the unexpected and, at the same time, not unnecessarily linking money that could otherwise be used for the project. The contingency is usually 5 to 10% of the firm costs. However, it is not always thought through how money is allocated during the project, which can be the source of problems during the project. The lower the cost of construction, the lower its contingency, as long as you don't get carried away by the time we are in it.
A construction with more allocations should budget more than a well-specified construction with very few allocations. An urban construction should budget more than a rural one. One located in a remote area or on difficult terrain should budget more than one on flat city land with all utilities readily available. Construction contingencies are generally calculated between 5 and 10% of the construction budget.
This percentage varies depending on the project. There are more precise methods for calculating this, such as deterministic and probabilistic methods. The design contingency is usually up to 10% of the total construction cost. Although calculated and identified separately, the contingency amount must be an additional amount maintained by the owner in the project budget.
The owner keeps the budget and withholds it for use by the architect and designers to ensure that the entire desired scope is covered.
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