Bill of Quantities Example
What is a Bill of Quantities?
The bill of quantities (BoQ) is used to identify the quantities of work contained within construction drawings. The quantities are usually measured by a quantity surveyor (QS) using a standard method of measurement. Once the work is measured, the QS will add a description or specification to the quantities so as the work is fully defined.
Purpose of a Bill of Quantities?
The BoQ will be used in Construction Tenders as a pricing document for the works. Where a BoQ is not issued, and construction drawings are issued on their own, the quantities from the drawings can be left open to interpretation and the quotations received may not to be comprehensive or comparable from each bidder.
The BoQ may form part of a contract agreement such as a JCT standard building contract. The contract sum price agreed for the works will be broken down in detail and set out in the BofQ to make it clear what is included.
Post contract agreement the BoQ serves as a tool to carry out valuations for interim payments, a way of scheduling out materials, a basis for cost reporting, and a document to assist with cash flow prediction. The rates already agreed for each element of work in the BoQ will also offer some protection to the client when the works progress and there are variations to the quantities. In this situation the rates in the BofQ can be used instead of a new quotation. New quotations received post contract/agreement could be inflated or not as cost effective as prices received at competitive tender stage.