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Do You Need a Party Wall Notice?

Check whether your extension triggers the Party Wall Act 1996. Answer questions about your walls, boundaries, and foundation depth to find out which sections apply.

Semi-detached and terraced houses share at least one wall

Cutting into it, adding steelwork, or raising the shared wall

Common with side-return extensions

Includes garages, outbuildings, and conservatories with foundations

m

Typically 1-1.2m for trench foundations. Your structural engineer specifies this.