Building Control Route Checker
Chooses likely next route: planning-first, full plans, building notice, competent person, regularisation, or specialist advice.
Full plans, building notice or regularisation?
Compare the three common building-control routes, when each may fit, and what evidence the homeowner should keep.
Plain answer
Use full plans when design certainty matters before work starts. A building notice may suit simpler domestic work where details are already settled. Regularisation is for certain completed unauthorised work and can require opening up work; it is not a tidy substitute for applying before work starts.
Route comparison
| Route | Best fit | Main risk | Evidence to keep |
|---|---|---|---|
| Full plans | Extensions, lofts, structural work, complex drainage, linked fire/energy details. | More preparation before work starts, but fewer unresolved site surprises. | Approved plans, calculations, specification, inspection records, completion certificate. |
| Building notice | Clear, straightforward domestic work with competent builders and simple details. | Problems can surface on site after money is committed. | Notice acknowledgement, inspection notes, photos, certificates, completion record. |
| Regularisation | Older completed work where approval evidence is missing and the local authority route is available. | May need opening up; approval is not guaranteed. | Photos, invoices, drawings, certificates, survey notes, local authority correspondence. |
Common mistakes
- Choosing building notice to avoid preparing structural or energy details.
- Starting work before inspection stages are agreed.
- Assuming planning permission removes the building regulations duty.
- Leaving completion certificate and competent person certificate checks until sale.
How to choose without guessing
Start with the risk, not the form name. If the project has structural calculations, new habitable space, fire-safety links, complex drainage or energy details that the builder has not specified, full plans usually gives a clearer paper trail. If the job is genuinely simple and the builder already knows the inspection stages, a building notice may be enough, but it still needs records.
Regularisation sits in a different place. It is a conversation about work already done without the right evidence, and it may involve opening up finished work. Treat it as a recovery route, not as a convenient alternative to applying before work starts.
Next useful checks
Full Plans vs Building Notice Checker
Compares project complexity, certainty needs, start timing and structural risk.
Building regulations completion certificate
What a completion certificate proves and why it matters when selling or remortgaging.
Building regulations documents to keep
Checklist of building regulations paperwork, inspection records, certificates and project evidence to keep for sale, remortgage and future work.
Planning and building regulations project map
A bridge between BuildingRegsGuide and UKPlanningGuide showing which project questions belong to planning and which belong to building control.
Planning permission vs building regulations
Plain-English guide to planning permission vs building regulations for homeowners, with building-control route prompts, certificate evidence, official sources and practical next steps.