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The completion certificate: why it matters

The final building control document records statutory sign-off of the completed work: a council normally issues a completion certificate, while a private approver uses a final certificate. Keep it with the property records because a planning approval or an approved drawing set does not replace it. [1][2]

What has to happen before issue

Building control needs to be satisfied with the relevant work and the completion evidence. A final inspection may identify outstanding items, and the required declarations and supporting certificates must also be provided. Physical completion is therefore not the same event as statutory sign-off. [3] [4]

Arrange a review before the builder leaves permanently. Identify missing installation certificates, test results, commissioning information and outstanding inspection matters. Give each item an owner and a target date so the final application is supported by a coherent record.

Check which document you are receiving

A council full plans approval concerns the design submitted before or during construction. An initial notice establishes a private building control route. Neither is the final certificate for the completed work. Make sure the document you retain identifies the property, relevant scope and correct application or notice reference. [1] [5]

For BSR-controlled higher-risk building work, the regulator has a separate completion-certificate application process. Do not use an ordinary house-extension handover checklist as a complete account of that regime. [6]

What a certificate does not replace

Building control is a compliance-checking service, not continuous supervision of every item of workmanship. Its certificate should not be presented as a contractor's guarantee, a structural warranty or a record that every contractual finish has been inspected. Richmond explains the limits of its site-inspection role. [7]

It also does not replace separate planning approval or a sewer company's agreement where required. Keep those documents as separate parts of the property's record rather than assuming one approval covers all authorities. [8] [9]

Why homeowners should keep it

GOV.UK warns that failure to obtain the necessary building regulations approval can create problems when selling a property. An organised completion record makes it easier to answer questions about what was built and which approvals were obtained. [8]

Store the final document with the final drawings, structural calculations, specialist installation certificates and relevant maintenance information. Give future owners enough context to distinguish the approved work from later alterations.

If the certificate has not arrived

Ask building control for a written list of outstanding items. Confirm whether the issue is a missing final inspection, uncompleted work, missing declarations or another evidence requirement. Resolve that list rather than assuming that silence means approval or that paying the final builder's invoice closes the regulatory process. [3] [4]

Sources 9 references
[1]
[3]
Completion certificates

Cannock Chase District Council · accessed 2 Oct 2026

[4]
Building control: dutyholders and responsibilities

London Borough of Newham · accessed 2 Oct 2026

[5]
Building control: initial notices

London Borough of Newham · accessed 2 Oct 2026

[6]
Applying for a completion certificate: higher-risk buildings

Building Safety Regulator / GOV.UK · accessed 2 Oct 2026

[7]
About building control site visits

London Borough of Richmond upon Thames · accessed 2 Oct 2026

[8]
Building regulations approval

GOV.UK · accessed 2 Oct 2026

[9]
Do I need a build over agreement?

Thames Water · accessed 2 Oct 2026

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