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Outbuildings Planning Permission

Annexes (or Granny Annexes as they are often called) can be in detached outbuildings or added as extensions to existing properties.

Planning For Outbuildings

Annexes, often called Granny Annexes can be in detached outbuildings or added as extensions to existing properties. Granny Annexes are useful because they can provide vital, additional accommodation for an elderly relative or a younger member of the family who is still at home. The annexe or extension forms part of the original home boundary and ownership but may have a separate entrance.

While an outbuilding can sometimes be undertaken through permitted development, in many cases it will require planning permission. A permitted development extension or outbuilding will be limited by the scale, materials and use.

The important point to note is that whether you extend the original dwelling or add an additional building in the garden for occupation, you should seek either planning permission or a Lawfulness Development Certificate from the local planning authority.

The proposed use of an annexe is important in determining whether it is classed as ‘incidental’ or ‘ancillary’ use (just another room in the house or self-contained).

The definitions and arguments that determine whether an annexe is incidental or ancillary are complex, so obtaining professional advice before undertaking any work is vital.

At Plande, we assist with your annexe or outbuilding projects and can guide you through the process. We advise on options and limitations, as well as managing the application.


Granny Annexes & the Caravan Act

How does The Caravan Sites Act (1968) come into play when considering a granny annexe?

Amongst other matters, the act defines clearly what determines a caravan and a mobile home. Caravans often do not require planning permission as they are mobile and can be transported on a road. The Act specifies the maximum sizes which can allow for annexes to be larger than some houses as well as placing other restrictions and limitations. In recent years, many companies have developed products that conform to the act but look more like lodges or log cabins than a traditional static caravan.

How Long Does Granny Annexe Planning permission Take?

Plande is extremely successful in obtaining planning permission for granny annexes and outbuildings. The whole application process from beginning to end should take approximately 8-10 weeks.


Disclaimer: This page provides an introduction only and is not a definitive statement of the law and should therefore not be relied upon. The information above relates to England only. Policies across the rest of the UK may differ. Contact your Local Planning Authority for advice and confirmation before any works are carried out. All images used are for illustrative purposes only. Read the full disclaimer here.

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