PROJECT BASICS
What is a building regulations completion certificate and why do I need one?
A building regulations completion certificate is an important record at the end of relevant building work. In the local authority route, it records that building control is satisfied with compliance for the work covered, based on its checks and the information available.
People sometimes call it a certificate of completion. It is different from a builder’s invoice or an architect’s practical completion certificate.
Is it the same as approval of the plans?
No. Approval of plans concerns the proposed work. A completion certificate concerns the completed work. Having an approved drawing does not, by itself, establish that the construction followed it.
For an extension or loft conversion, keep both the design information and the completion record. Check that the certificate identifies the correct property and scope.
What if I used private building control?
A registered building control approver normally provides a final certificate through the private building control process. It is given to the local authority under that route. Ask for your copy and confirmation that the final certificate has been accepted.
Some eligible specialist installations can be self-certified through a competent person scheme. Their building regulations compliance certificates cover the relevant work; they do not automatically certify an entire extension or loft conversion. An electrician’s testing certificate is also a different document.
Why do I need the certificate?
It helps demonstrate that the building control process for the work has been completed. When you sell or remortgage, a solicitor or lender may ask for evidence relating to alterations.
Missing paperwork can lead to questions and delays. Obtaining and keeping the appropriate record when the work finishes is easier than tracing the contractor and inspection history years later.
Is it a guarantee that everything is perfect?
No. A completion or final certificate is not a warranty covering every defect, decorative finish or item of workmanship. Building control checks do not amount to continuous supervision.
You still need an appropriate building contract, competent contractors and suitable checks on the quality of the work.
How do I obtain it?
Ask building control at the start what inspections and completion information will be needed. Arrange inspections while relevant work is accessible.
At the end, notify building control that the work is complete, arrange the final inspection and supply the requested certificates, declarations and other evidence. Resolve outstanding items and request the appropriate completion record. Keep a digital copy with the drawings and project documents.
What if the certificate is missing?
First establish whether it was issued. Contact the original building control provider with the address and application reference and ask for a copy.
If the application remains open, ask what is outstanding. If work was carried out without the required approval, speak to the local authority about whether regularisation is available. That separate process can require investigation, opening up or remedial work; it is not simply a replacement certificate.
Drawings help explain the proposal, but your drawing provider cannot issue the building control completion certificate. Agree the application, inspection and handover responsibilities before work starts.