Unit rate of items: Unit rate estimating is a method that can be used to calculate building costs. In unit rate estimating the prices of items on the bill of quantities are each calculated separately. Unit rate of items includes the contractor's profit. 
Work charged establishments: It will include such temporary establishments as are employed for the execution of the immediate technical supervision or departmental stores and machinery in connection with a specific work. 
Contingencies: It is an amount of money set aside to cover any unexpected costs that can arise throughout a construction project. This money is on reserve and is not allocated to any specific area of work. 
Specifications: It describes the products, materials, and work required by a construction project. They do not include cost, quantity, or drawn information, and so need to be read alongside other information such as quantities, schedules, and drawings.