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What does and doesn’t count as an Annexe?

  • Katy Lycett

With property prices, care home costs and private renting all leading to many people struggling to afford the accommodation that they need there are families seeking a route which might be a solution. Annexes can be a great way to allow extended family members to live together, and this is popular for inter-generational living of all ages.

Source: Stannah

If you are looking to create an annexe at your home for a family member there are some key things to consider:

  • Depending on your circumstances you may require planning permission to create an annexe.
  • If your preference is to create a standalone building in the garden the structure often requires planning permission depending on the size and location. Some outbuildings can be created without consent if they are incidental to the main dwelling and will be used for a home office, home gym or shed. If the outbuilding is to be used for permanent accommodation as an annexe however, this would require planning permission. Some dwellings also have their Permitted Development rights removed relating to outbuildings so permission would also be needed.
  • Alternatively, if the preference is to convert and extend an existing property/garage to create an annexe this will also likely require planning permission.
Source: Stannah

An annexe has several key features which distinguish it from being a separate dwelling:

  • Annexes need be ‘ancillary’ to the main dwelling i.e. they should be used for additional accommodation for family members and main activities should still take place within the main dwelling e.g. meals and socialising.
  • An annexe should create very limited accommodation; creating multiple bedrooms, full kitchens and large internal spaces will generally not be supported as this strays from the function of annexe accommodation.
  • Some Local Planning Authorities have dedicated planning policies which specify further requirements for the creation of an annexe. This does vary so always best to check first. There are some requirements for annexes to be physically connected to the main house – other Councils do not. It’s always best to check!
  • Annexes do not usually require additional dedicated parking or private gardens as the general functions should be provided by the existing dwelling.
  • Annexes by their nature cannot be sub-let, sub-divided or sold-off for private sale and any occupants should be part of the family unit – usually older members of the family or older dependents looking for independence. Councils will often attach restrictive conditions to any planning permission for an annexe to limit how the space can be used and by whom.

If you are seeking the creation of a separate dwelling this would have a different set of considerations including:

  • Dedicated, independently accessible vehicle parking for both the host (existing) and new dwelling.
  • Dedicated independently accessible private garden spaces for both the host (existing) and new dwelling.
  • Impact upon nearby dwellings and occupiers in terms of any increase in overlooking, loss of privacy or change in outlook/amenity.
  • Policy considerations if the site falls within a location where new dwellings are generally discouraged unless for very specific circumstances e.g. open countryside or the Green Belt.
  • Compliance with relevant internal space standards to ensure that any new dwelling has sufficient room sizes to create a pleasant living environment.

Get in touch!

If you are thinking about the future and planning ahead for your family and might like to explore creating an annexe, please get in touch! Planning requirements vary between Local Planning Authorities and site-specific advice should always be sought. 

We can review any key information to assist you and set out options and possible next steps.

How to get in touch…

Having a consultant involved in your project, is a great way to reduce the risk of errors and it can drastically speed up the timeline for achieving planning permission.

If you think you need support with your project, we’d be happy to help.

You can contact us directly via the details below, or if you would prefer, you can fill in the form below and one of the team will be in touch.

T: 01908 592580
E: info@warnerplanning.co.uk

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