Whether you’re making a separate living space for grown up children or elderly parents, or you’re thinking of starting a holiday let, an annexe could provide the right solution. That said, as with any major home improvement, adding an annexe will take time and investment. If you want to add value to your home, it’s important to keep an eye on costs and make some key decisions ahead of the build.

Help is at hand with our guide to annexes, with tips on what you should do to add the most value to your home.

 

Planning permission is usually required especially if it is a new detached structure or a significant extension to an existing property.

New Detached Annexes/Garden Room: If you are constructing a new detached building in your garden, you will typically need planning permission. This would include any self-contained living space that is separate from the main dwelling. 

Self-Contained Living Spaces:

If the annexe is designed to be a self-contained living space with its own kitchen, bathroom, and separate entrance, it is considered a new dwelling and requires full planning permission

. 
Significant Extensions:

If you are significantly extending your home to create an annexe, planning permission is usually necessary. Local councils will assess the impact on neighbours and the environment, as well as the design and materials used. 

Change of Use:

Converting an existing outbuilding or garage into an annexe may also require planning permission, particularly if it involves a material change of use. ​