A unit of measure is the unit used to quantify an item of work, for example in a bill of quantities or pricing schedule.
Using the correct unit is essential, because the rate and the quantity must match. In the UK, the unit for each type of work is set by the measurement rules being used, most commonly NRM2 for building works and CESMM for civil engineering works. Common units include:
- m (linear metres) for items such as pipes, kerbs and skirtings
- m² (square metres) for items such as walls, floors and roof coverings
- m³ (cubic metres) for items such as excavation and concrete
- t for tonnes, nr for a number of items, and item for work priced as a lump sum
When checking a pricing document, look out for rates and quantities stated in different units, which give misleading totals.
Related terms: quantity, unit rate, NRM2, bill of quantities.
