Permitted development is one of the most useful — and most misunderstood — parts of the UK planning system. Here's a plain-English rundown of what it actually allows.
The basic idea
Permitted development rights allow certain types of building work to go ahead without submitting a full planning application, provided the work stays within specific limits set out in national planning regulations. It exists so that reasonably modest home improvements — a rear extension, a loft conversion, a garden outbuilding — don't all need to go through the full planning process, so long as they're not disproportionate to the property or its surroundings.
What's commonly covered
Extensions, loft conversions, and garden structures like outbuildings and garden rooms are the projects that most often fall under permitted development, subject to limits on size, height, and how close to boundaries they sit. The exact limits differ depending on the type of project and vary between a single-storey extension and a two-storey one, for example — there isn't one universal number that covers every scenario.
What removes permitted development rights
Permitted development rights don't apply everywhere, or to everyone. Listed buildings lose them for almost any alteration. Conservation areas and other designated areas often have tighter restrictions. Flats and maisonettes generally don't have the same rights as houses at all. And some properties have had permitted development rights removed by a planning condition on a previous application, or by what's known as an Article 4 direction from the council. If any of these apply to you, don't assume permitted development covers your project — check first.
When you still need to apply
If your project goes beyond permitted development limits — too large, too tall, too close to a boundary, or on a property where rights have been restricted — you'll need a full planning application, which is a more involved process requiring council assessment and a formal decision.
How a drawing pack helps either way
Even when a project is likely to be permitted development, it's common — and often required — to get formal confirmation in the form of a Lawful Development Certificate, which gives you documented proof the work is lawful without a planning application. We assess permitted development eligibility as part of our compliance pack and prepare the plans needed to support that certificate, so you have a clear, documented answer rather than an assumption.
Not sure whether your project needs full planning permission or falls under permitted development? See how we can help you find out.