Answer
Do I need planning permission for a natural swimming pond?
Normally no, but check designated land, ground levels and protected species near water.
In short
A domestic natural swimming pond normally needs no planning permission. The things to check are designated land or a listed property, any significant change to ground levels, and protected species near existing water, where an ecological survey can be needed. We confirm the position before we begin.
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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