Extending a dormer roof - can it be done?

We explore whether it's possible to extend an existing dormer to full width.

If you have an existing dormer, you might be wondering whether you can extend it further to make it full width. Here, we'll look into whether extending a dormer roof can be done.

Can you extend an existing dormer?

Extending an existing dormer is normally possible under Permitted Development Rights providing certain limits and conditions are met.

However, it's always recommended to contact your local planning authority (LPA) in advance to understand if there are any restrictions to be aware of.

Even if you don't need planning permission to extend an existing dormer, you must still adhere to building regulations. An experienced local builder will be able to guide you through the requirements.

Why extend an existing dormer?

A dormer is a type of extension that juts out from a roof slope, typically with a window added.

If your property has an existing dormer that doesn't span the full width of the roof slope, you may be keen to explore the possibility of extending it.

A dormer can boost kerb appeal, provide more space inside your home, and bring in more natural light. Creating a bigger dormer will maximise these benefits while helping to square off any awkward-shaped rooms and increase ceiling height.

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