Exemptions for annexes

Occupied annexes

This exemption applies when an annexe is occupied by a dependent relative.

The annexe must form part of a single property that also includes another dwelling, and it should not be let separately from the main dwelling without a breach of planning controls.

A dependent relative is a person who is:

• aged 65 years or more; or

• severely mentally impaired; or

• is substantially and permanently disabled (whether by illness, injury, congenital deformity or otherwise)

• dependent on the occupants of the main property associated with the annexe

For this exemption, a relative includes a spouse, civil partner, partner, parent, child, grandparent, grandchild, brother, sister, aunt, uncle, nephew, niece and all previous generations (for example great-grandparent or great-great-grandchild).

The exemption will end if planning restrictions change, for example if a certificate of lawfulness is granted or ancillary conditions are removed, or if the annexe is no longer occupied by dependent relatives.  

You can apply to claim an exemption for an occupied annexe.

50% family annexe discount

The 50% family discount may apply if an annexe:

• forms part of a single property which includes one other dwelling, and

• is being used by a resident of that other dwelling as part of their sole or main home, or

• is the sole or main home of a relative (not a dependant relative) of the resident of the other dwelling

If you want to apply for the 50% discount, you will need to contact us and give us details of how the annexe is being used and by whom.

Unoccupied annexes

This exemption applies when an annexe is unoccupied and is part of a single property that also includes another dwelling. The annexe should not be let separately from the main dwelling without a breach of planning controls.

Occupancy of these annexes is usually restricted to family members of the residents of the other dwelling.

The exemption applies while the annexe remains unoccupied and the planning restriction is in place and applies whether the annexe remains furnished or not.

The exemption can also apply if the main property is the unoccupied dwelling, rather than the annexe. The exemption continues to apply even if the other main dwelling becomes unoccupied.

The exemption will end if planning restrictions change, for example if a certificate of lawfulness is granted or ancillary conditions are removed, or if the annexe becomes occupied by someone other than a dependent relative.

You can apply to claim an exemption for an unoccupied annexe.