Reference Library

UK construction estimating glossary.

Clear, practical definitions of fundamental terms used in UK construction estimating, quantity surveying, and project tendering.

Approximate Quantities

An estimating technique using high-level measured quantities before full working drawings are produced.

A combined rate combining labour, materials, plant, and waste build-ups for a complete element (e.g. m² of brickwork).

An itemised breakdown of measured work items, quantities, and units prepared to standard rules (e.g. NRM2).

An early-stage cost prediction used by clients to check financial feasibility prior to detailed design.

A specific budget set aside for unquantified risks, unforeseen site conditions, or scope variations.

A method of pricing works based on actual hours worked, material costs plus percentage mark-ups, and plant hire rates.

Organising cost items by building element (substructure, superstructure, finishes) rather than trade.

The percentage added to net costs to cover corporate office expenses and yield business profit.

Site management, scaffolding, skips, temporary power, insurance, and setup costs required to run a construction project.

An allowance for materials or goods to be supplied by a specialist supplier, excluding contractor installation.

A cost allowance included for work that cannot be fully defined or measured at the time of tender.

A list of agreed unit prices used to value work as it is measured on site during small works or maintenance contracts.

A descriptive list of tasks and specifications detailing what work must be carried out, often unquantified.

The process of measuring quantities of materials and labour tasks directly from architectural drawings or site measurements.

The formal commercial offer submitted by a contractor in response to an invitation to tender.