Permitted Development Rights: What You Can Build Without Planning Permission

If you’re considering extending your home, adding a loft conversion, or making other changes to your property, you may not need planning permission at all. Permitted development rights allow homeowners to carry out a range of works without a formal planning application — but the rules are more nuanced than most people realise.

What is Permitted Development?

Permitted development (PD) is a type of planning permission granted automatically by the government, rather than through a local planning authority application. It applies to most dwellinghouses in England, subject to certain size limits and conditions.

The rules were introduced to streamline the planning system and allow homeowners to make reasonable improvements to their homes without the cost and uncertainty of a full planning application.

“Permitted development rights are granted automatically by the government — meaning no planning application, no planning officer, and no uncertainty about the outcome.”

Common Permitted Development Works

Under current PD rights, you can typically carry out the following without a planning application:

• Single-storey rear extensions up to 4m deep for detached houses, 3m for semi-detached and terraced houses (or up to 8m/6m under the prior approval neighbour consultation scheme)
• Loft conversions with a roof extension of up to 50 cubic metres for detached houses (40 cubic metres for semi-detached and terraced)
• Side extensions up to half the width of the original house
• Outbuildings in the garden of up to 15 square metres without building regulations approval
• Changes to windows and doors in most cases

When Permitted Development Doesn’t Apply

There are several situations where PD rights are removed or restricted:

• Listed buildings — listed building consent is required for any alterations
• Conservation areas — additional restrictions apply, particularly to roof extensions, cladding, and side extensions
• Article 4 directions — local councils can remove PD rights in specific areas
• New build properties — some new developments have PD rights removed by planning condition
• Flats and maisonettes — PD rights only apply to dwellinghouses, not flats

Lawful Development Certificates

Even when works fall within permitted development, we always recommend applying for a Lawful Development Certificate (LDC). This is a formal certificate from the local planning authority confirming that the works are lawful. It is invaluable when selling the property and provides certainty for mortgage lenders.

“An LDC is far simpler and less expensive than a full planning application — and provides the documentary certainty that buyers, solicitors, and lenders increasingly expect.”

We include LDC applications as standard in our house extension and loft conversion services.

Advice for Isle of Wight Homeowners

The Isle of Wight has a relatively straightforward planning context for PD works, but there are several conservation areas across the island — including parts of Shanklin, Ryde, and Newport — where additional restrictions apply. If your property is within a conservation area, or if you are unsure about your PD rights, please get in touch for a free initial consultation.

We serve homeowners across the Isle of Wight and through our London office at 55 Whitfield Street we also assist with PD and planning matters throughout London and the South Coast.