Building regulations explained: what your builder should handle

Building regulations are one of those topics that cause unnecessary anxiety. They exist to ensure buildings are safe and energy efficient, and a competent builder will manage the process as part of any project. Here is what you need to know.

Building regulations vs planning permission

These are two separate systems that are often confused. Planning permission is about whether you are allowed to build something in a particular location. Building regulations are about how the work is carried out, covering structural safety, fire protection, insulation, ventilation, drainage, and electrical safety. You can need one without the other, or both.

When are building regulations required?

Almost any structural work requires building regulations approval. This includes extensions, loft conversions, removing load-bearing walls, rewiring, installing new heating systems, and replacing windows. Minor work like redecorating, replacing a kitchen, or building a small garden shed is generally exempt.

How the process works

There are two routes to compliance. A full plans application involves submitting detailed drawings to the local authority or an approved inspector before work starts. The alternative is a building notice, which is simpler but gives less certainty upfront. For anything beyond a straightforward project, full plans are usually the better option.

During the build, an inspector will visit at key stages such as foundations, damp proof course, drainage, and completion. Your builder should know when to book these inspections and what needs to be ready at each stage.

Completion certificates

When the work is finished and passes final inspection, you receive a completion certificate. This is an important document. If you ever sell your home, your solicitor will need to see completion certificates for any regulated work. Missing certificates can delay or even derail a sale, so always make sure you receive yours.

A good builder will handle building regulations as a routine part of the job. If someone suggests skipping the process to save time or money, that is a warning sign.