Last edited 07 May 2018

Risk allowance

The New Rules of Measurement (NRM) are published by the Royal Institute of Chartered Surveyors (RICS). They provide a standard set of measurement rules for estimating, cost planning, procurement and whole-life costing for construction projects.

According to NRM1: Order of cost estimating and cost planning for capital building work, the term 'risk allowance' refers to:

'...the amount added to the base cost estimate for items that cannot be precisely predicted to arrive at the cost limit.'

Where the 'base cost estimate’ means:

β€˜β€¦an evolving estimate of known factors without any allowances for risk and uncertainty, or element of inflation. The base cost estimate is the sum of the works cost estimate, the project/design team fees estimate and the other development/project costs estimate.’

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