The certificate at the end matters more than most people realise, because it is what a buyer's solicitor will ask for.
What needs approval
Structural alterations, extensions, loft conversions, new drainage, most electrical work, replacement windows, new heating appliances and changes of use all fall within the regulations.
Like-for-like repairs and most decorative work do not. Kitchen and bathroom refits sit in between: the fit-out itself may not, but the electrics, drainage and ventilation within them usually do.
How the process runs
An application is made before work starts, inspections take place at key stages — foundations, damp proof course, structure, insulation, drainage before covering — and a completion certificate is issued at the end.
The critical practical point is that inspections happen before things are covered up. Missing one can mean opening work back up at your cost.
Why the certificate matters
When you sell, the buyer's solicitor will ask for certificates for any work that needed them. Missing paperwork causes delays, price reductions or indemnity insurance requirements.
Regularisation of past unapproved work is possible but is slower and more intrusive than doing it properly at the time.
Common questions
Is building control the same as planning?
No. Planning governs whether the work is acceptable in principle and in appearance; building regulations govern how it is constructed.
Who applies?
Either the homeowner or the contractor. We handle applications and inspection bookings as part of our scope on most projects.
What if past work was never approved?
It can usually be regularised, which typically involves exposing elements for inspection. It is worth resolving before marketing a property.
Does a kitchen refit need approval?
The fit-out itself often does not, but associated electrical work, drainage alterations and ventilation generally do.