Build UK, with the support of CECA, is rolling out the Common Assessment Standard to improve efficiency and reduce cost in the construction pre-qualification (PQ) process.

The Common Assessment Standard is available from three Recognised Assessment Bodies, and Contractors and Clients have now started specifying that their supply chains are certified to the standard.

Once the new system is fully up and running, companies will be certified once a year by a Recognised Assessment Body and this should be accepted by Contractors and Clients who will no longer need to specify a particular assessment body.

Common Assessment Standard

The Common Assessment Standard comprises an industry-agreed question set based on existing PQ questionnaires, including PAS 91, and corresponding assessment standards.

There are two levels of certification: desktop and site-based. Companies apply to a Recognised Assessment Body for the certification level that is most appropriate for their business based on a range of factors including trade, size and the requirements of their clients.

For companies that employ fewer than 10 employees and have a turnover below £1.8 million or a balance sheet total less than £1.8 million, the assessment standards will be applied in a proportionate way.

A guide to the question set has been published to help companies prepare for an audit by a Recognised Assessment Body.

The Common Assessment Standard is regularly reviewed, and to submit any suggested changes, please complete this form.

Organisations Using The Common Assessment Standard

  • ASUC
  • Balfour Beatty
  • BESA
  • Bouygues UK
  • Clancy Group
  • Costain
  • Derwent London
  • HS2
  • Keltbray
  • Kier
  • Mace
  • Multiplex
  • Osborne
  • Sir Robert McAlpine
  • Sisk
  • Skanska
  • Tilbury Douglas
  • VINCI Construction UK
  • VolkerWessels UK
  • Wates

Recognised Assessment Bodies

Common Assessment Standard Achilles CHAS Constructionline
Desktop BuildingConfidence Gold Desktop Audit CHAS Elite (CAS) Constructionline Gold
Site-Based BuildingConfidence Gold 1 Day Audit CHAS Elite (CAS) Assured Constructionline Platinum

All Recognised Assessment Bodies have demonstrated their capability to audit companies against the Common Assessment Standard.

Any organisation interested in becoming a Recognised Assessment Body should email