People have been warned they could face a surprise charge if they have a shed in their garden.
An expert said unexpected council tax demands could arise if a common change was made to the garden structure.
While the so-called "new garden shed tax" won't apply to everyone, Sam Jenkinson from garden building retailer Tiger, said it was becoming increasingly common across the UK.
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He said the charge could apply to those with a shed or outbuilding that has been transformed into a self-sufficient living area, according to the Express .
Sam said: "Government guidance states that a property is considered a separate dwelling and can therefore be assigned its own council tax band if it includes an independent