Answer
Do I need planning permission to raise the level of my garden?
Often yes if the change is significant, especially near a boundary or affecting neighbours.
In short
Often, yes. Raising the ground level significantly, for example to level a sloping garden with a raised terrace or built-up beds, can need planning permission, especially near a boundary or where it affects neighbours or drainage. We assess it as part of the design rather than leaving it to chance.
A note
General guidance, not advice. Rules vary by site, and Article 4 directions or conditions can change what applies. Check with your local authority and the Planning Portal.
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