Building regs guide · England & Wales

Building control approval.

Building control is the sign-off that your finished work meets the Building Regulations. It is separate from planning permission, and almost every structural project needs it. Here is how it works in England and Wales, the two routes available, and how we handle it for you.

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What is building control — and do you need it?

Building control checks that the way your project is built meets the Building Regulations — structure, fire safety, insulation, drainage and more. It runs through plan checks and site inspections at key stages, ending in a completion certificate.

You need it for almost all building work beyond minor repairs: extensions, loft and garage conversions, removing load-bearing walls, new openings, drainage and new builds. That completion certificate matters — buyers and their solicitors routinely ask for it when you come to sell.

England and Wales have separate building regulations. Since 2024, private building control across both nations is provided by Registered Building Control Approvers (the new name for approved inspectors), registered with the Building Safety Regulator.

Your two routes to building control approval

For a normal home project you can use either route — the standards are identical. The difference is who carries out the checks.

Route 1 — Local authority

  • Your council’s building control team checks plans and inspects on site
  • Available everywhere in England and Wales
  • Only local authorities can enforce if something goes wrong
  • Co-ordinated nationally through LABC

Route 2 — Registered building control approver

  • A private, registered provider (formerly an “approved inspector”)
  • Registered with the Building Safety Regulator since 2024
  • Carries out the same plan checks and inspections
  • Often chosen for speed and continuity across a project
For a normal extension or loft conversion either route is fine — the standards are the same. We submit your project, line up the inspections at the right stages, and make sure you receive the completion certificate at the end.

How Arkiplan gets your project signed off

We are an online architectural design service — the practical alternative to a traditional high-street architect. We prepare and submit your building control application, schedule the inspections at the right stages, and chase the completion certificate so you are not left without paperwork.

Building control FAQ

What is building control?

Building control is the process that checks your work meets the Building Regulations — the technical standards for structure, fire safety, insulation, drainage and ventilation. It involves plan checks and site inspections, ending in a completion certificate.

Is building control the same as planning permission?

No. Planning permission decides whether you can build and how it looks; building control checks how it is built. Many projects need both, and they are applied for separately.

What is the difference between full plans and a building notice?

A full plans application has building control check your drawings before work starts. A building notice lets simpler work begin with less paperwork but no pre-approved plans. For extensions we usually recommend full plans.

What is a completion certificate and why does it matter?

It is the document building control issues once your work passes its final inspection, confirming it meets the Building Regulations. Buyers and their solicitors routinely ask for it when you sell, so it is important to obtain one.

Local authority or a registered building control approver — which should I use?

Either is fine for a normal home project; the standards are identical. Local authority building control is available everywhere, while a registered building control approver is a private alternative often chosen for speed. We will recommend the best fit and handle the submission.

What if work was already done without building control sign-off?

You can usually apply for regularisation, where building control assesses existing work after the fact. It can mean opening up parts of the build to inspect them. We can advise on the best route for your situation.

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This guide is general information, not formal advice; building regulations and building control procedures change and depend on your specific project, property and local authority. We confirm the current position for your project as part of every job.