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  • Writer's picturePekaj Group Pty Ltd.

Understanding Bill of Quantities (BOQ)

Updated: Jan 20

Bill of quantities (BOQ) is a detailed list of all the materials, labour and equipment needed for a construction project. It is a critical document used in the tendering process and plays a crucial role in the successful completion of construction projects. In this blog, we will explore the importance of BOQ in construction, how it is prepared, and how it is used in the tendering process.


BOQ is a valuable tool for construction projects as it provides a clear and detailed breakdown of all the items required for the project. This information is crucial in determining the cost of the project and helps to avoid cost overruns. BOQ is also useful in the tendering process as it provides contractors with a clear understanding of the scope of works and the materials required for the project. This information helps contractors to prepare accurate quotes for the project and ensures that the project is completed within budget and on time.


BOQ is prepared by a quantity surveyor or an experienced estimator and is based on the project specifications and scope of works. The quantity surveyor or experienced estimator will analyse the project requirements, including the materials, labour, and equipment needed, and prepare a detailed list of all the items required for the project. This information is then used to determine the cost of the project and to prepare a cost plan.


BOQ is used in the tendering process to help contractors prepare accurate quotes for the project. Contractors will use the BOQ to determine the cost of the materials, labour, and equipment required for the project and to prepare a quote for the project. This information is then used by the builder or contractor to compare quotes from different contractors and to determine which contractor is the best fit for the project.


It is important to note that BOQ is a living document and is subject to change as the project progresses. This means that the BOQ may be updated as the project specifications change, or as latest information becomes available. It is important to ensure that the BOQ is updated regularly to ensure that it remains accurate and up to date.


 An Estimator's Guide to Frame Take-Off

Table 1.0 Typical list of items following ANZMM2018 structure.


In conclusion, BOQ is a critical tool in the construction industry, supplying a clear and detailed breakdown of all the materials, labour, and equipment required for a construction project. It plays a crucial role in the tendering process, helping contractors to prepare accurate quotes for the project and ensuring that the project is completed within budget and on time. BOQ is also a living document and must be updated regularly to ensure its accuracy and to reflect any changes in the project specifications. With a thorough understanding of BOQ, builders, contractors, and quantity surveyors can ensure the successful completion of construction projects.


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