Planning Permission for House Extensions

Practical guide

Planning Permission for House Extensions

Some London extensions can be handled under permitted development, while others need a formal planning application. The right route depends on the property, previous alterations, conservation constraints, size, height, materials and neighbour impact.

• Check whether the property is in a conservation area or has previous extension history.
• Confirm whether permitted development rights apply before assuming the project is simple.
• Use drawings and structural input early so the quote is based on a buildable scheme.
• Allow time for party wall matters where work affects shared walls or boundaries.

Next step

Turn the idea into a sensible scope

Early advice is useful, but every London property has its own quirks. The next useful step is a clear conversation about the property, the work, the constraints and the level of finish you want.