What is Building Control approval?

Before your builder lays a single brick on a major project, there’s a crucial legal hurdle to clear – one that protects your safety, your investment, and the structural integrity of your home.

Whether you’re extending your kitchen, converting a loft, or building a new home from the ground up, there’s a regulatory process quietly running alongside your planning permission that most homeowners overlook until it causes a headache: Building Control approval.

Unlike planning permission, which is concerned with whether a project should be built, Building Control is about how it’s built. It exists to ensure that buildings are structurally sound, energy-efficient, fire-safe, and accessible. In England and Wales, this is governed by the Building Regulations 2010, a set of nationally applied technical standards.

What Are Building Regulations?

The Building Regulations set minimum standards across a broad range of construction topics. They are divided into Approved Documents -each covering a different aspect of construction. These include everything from foundations and drainage to fire safety, ventilation, and energy efficiency.

Compliance with these documents isn’t optional -it’s the law. Carrying out notifiable building work without approval can result in fines, enforcement notices, and serious complications when you come to sell your property.

“Building Control isn’t red tape – it’s the thing that stops your extension collapsing, your loft burning, or your electrics killing someone.”

When Do You Need It?

Most structural or significant works trigger a requirement for Building Control approval. This includes new builds, extensions, loft conversions, garage conversions, underpinning, the installation of a new bathroom or toilet, replacing windows and doors (in most cases), and adding a new electrical circuit. Even some repairs, like replacing a flat roof, can require notification.

Conversely, some minor works are exempt. Small detached outbuildings, certain types of internal alterations, and like-for-like replacement of components (such as a boiler swap under the Competent Persons Scheme) may not require a formal application.