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What is a certificate of compliance on completion?

It is the joint certificate signed by the assigned certifier and the builder at the end of the works, stating that the building has been designed and constructed in compliance with the building regulations. It is uploaded to BCMS and entered on the statutory register.

The certificate is submitted with as-built documentation and ancillary certificates from designers, specialists and the builder. The building control authority reviews it for validation and enters it on the register.

Where certification applies, a building should not be opened, occupied or used until the certificate is on the register. It is one of the first documents a purchaser's solicitor will look for.

Accompanying documents

  • As-built drawings and specification
  • Ancillary certificates from the design team and specialists
  • Records of inspections carried out
  • Test and commissioning certificates for services

Sources

Last reviewed 28 August 2026. General information only — not legal or planning advice.

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