Answer
Do I need planning permission for a koi pond?
A domestic koi pond normally needs none, but check designated land, listed status and protected species.
In short
A domestic koi pond normally needs no planning permission. The points to check are designated land or a listed property, and protected species where you are working on or near existing water. Building close to the house, or any associated structure or decking above 0.3 metres, can have its own considerations.
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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