Answer
Do I need planning permission for raised beds?
No, raised beds are not buildings; only significant retaining or level changes raise a question.
In short
No. Raised beds are not buildings and do not need planning permission. The only time it comes up is if they form part of significant changes to ground levels or large retaining structures near a boundary, which is a different question. Ordinary raised beds are fine.
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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