Is there a Council Tax discount for an annexe?
A self-contained annexe lived in by a relative, or used as part of the main home, can qualify for a Council Tax discount or in some cases an exemption. The right relief depends on who uses it and how. You apply to your council with details of the annexe and its occupier.
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Check what you're owed →Annexes are often billed separately because they can be treated as their own dwelling. To avoid families paying twice over, there are reliefs. Where a relative of the main household lives in the annexe, a discount on the annexe bill commonly applies.
There are also full exemptions in particular cases, such as where the annexe is occupied by a dependent elderly or disabled relative, or where it cannot be let separately from the main home because of planning restrictions. The category that applies depends on the exact circumstances.
Because annexe rules can be misapplied, it is worth checking your situation closely. If you think the annexe should not be a separate dwelling at all, you may also be able to challenge its banding. Look at your full entitlement to reductions while you review it.
How to claim annexe Council Tax relief
- Identify who uses the annexe. Note whether a relative lives there, whether they are dependent, and how the annexe is used.
- Match the right relief. Decide whether a discount or one of the exemption classes fits your situation.
- Apply to the council. Submit the relevant annexe discount or exemption form with details of the occupier.
- Consider the banding. If the annexe should not be a separate dwelling, ask the valuation authority to review it.
Frequently asked questions
- Why is my annexe billed separately?
- A self-contained annexe can be treated as a distinct dwelling, so it may receive its own band and bill, even though it forms part of your property.
- When does a discount apply?
- A discount commonly applies where a relative of the main household lives in the annexe, or where it is used as part of the main home.
- When is an annexe exempt?
- Exemptions exist, for example where a dependent elderly or disabled relative lives there, or where planning rules prevent it being let separately.
- Can I challenge the annexe being a separate dwelling?
- Possibly. If it should not be banded separately, you can ask the valuation authority to review it, which is a different process from a discount.
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