Building Control Final Inspection: What You Need for Sign-Off
PremiumHow to prepare for the BCO final inspection on your extension. The certificates you need, why sign-off takes months (not weeks), and what to do when trades won't certify.
Your builder packs up. The last tradesperson leaves site. You assume building control sign-off is a week or two away. It isn't. On real projects, the gap between the builder leaving and the BCO signing off your extension stretches to months. Sometimes over a year. And the delay has nothing to do with the quality of the building work.
It's paperwork. Specifically, certificates from your regulated trades. Until every certificate is sitting in your hand and submitted to building control, the BCO will not visit. The inspection itself takes an hour or two. The certificate chase that precedes it can consume your life.
12 months
The gap between the last physical building work and building control sign-off on a real UK kitchen extension project. The delay was entirely caused by a gas engineer who refused to register their work with Gas Safe. The BCO signed off one day after the certificates were finally submitted.
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