Planning · Permitted Development
Permitted Development Explained for London Houses
Permitted development can let some works proceed without a planning application — but in London it is heavily restricted. This guide explains what it covers and where it stops.
What permitted development is
Permitted development rights allow certain works to houses to proceed without a full planning application, subject to limits and conditions on size, height, materials and position. They are a national grant of planning permission for specified, modest works — but they come with conditions, and they are far from a blank cheque.
What it can cover
For houses, permitted development can cover some single-storey rear extensions within size limits, certain loft conversions, outbuildings, porches and other minor works. Each has detailed criteria — depth, height, the proportion of the garden used, materials and proximity to boundaries — and exceeding any of them takes the works outside permitted development and into needing planning permission.
Where it stops in London
London restricts permitted development heavily. Rights are reduced in conservation areas, and an Article 4 direction can remove specified rights entirely. Flats and maisonettes do not benefit from permitted development for extensions at all. Listed buildings and properties with planning conditions removing rights are also excluded. Because so much of prime London falls into one of these categories, permitted development cannot be assumed.
Building regulations still apply
Even where works are permitted development and need no planning permission, building regulations approval is usually still required. Permitted development is about planning, not construction standards, so the technical drawings and building control process are separate and still necessary.
Confirming with a certificate
Where permitted development may apply, a lawful development certificate confirms in writing that the works are lawful. This removes doubt for you, for neighbours, and — importantly — for a future buyer’s solicitor or lender. We assess whether your works are likely to be permitted development and whether a certificate is worth obtaining.
Frequently asked questions
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