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Our Guide to Garden Room Planning Permission

It can be frustrating to know exactly what you would like for a feature on your property, only to be dissuaded by the thought of needing planning permission. At Prime Stables, we understand this feeling well. As such, we have created this guide on garden room planning permission, to help you decide if your intended structure can go right ahead without any need for waiting.

Below, we have provided some advice that may give you peace of mind over your own garden room designs. Read on to learn more, or contact us right away if you would like to speak to us about building a garden room, from the largest storage space your property needs to the smallest, quietest home office for you to sit and work in peace.

Factors to Consider When Planning Your Garden Room

When beginning to plan your ideal garden room and outdoor space there are a few important factors to consider, if you’d like to avoid the hassle and frustration of getting planning permission through before you start:

  • The intended size of the structure (its width, height and floor area)
  • Its location in relation to your property boundary
  • Your intended uses for the structure (commercial or domestic)
  • If you intend to add amenities such as a toilet
  • If you intend to install features such as an antenna

Do You Need Planning Permission for a Garden Room?

It may come as a relief to know that, in most cases, planning permission is not required before you build a garden room or garden room extension in the UK. This is because garden rooms are usually considered “incidental” buildings under the permitted development rules. This does come with guidelines that must be followed, however, which mostly relate to the size, position and intended use of your new garden room.

No planning permission will be required for your intended build, as long as the finished garden room does not:

  • Sit forward of a wall forming a principal elevation, meaning the finished build will not sit in front of your property.
  • Exceed a maximum eaves height of 2.5 metres.
  • Exceed a maximum overall height of 4 metres if it has a dual pitched roof, or a height of 3 metres if it has any other type of roof.
  • Exceed a maximum height of 2.5 metres if it’s located within 2 metres of the boundary of the property’s curtilage.
  • Have any verandas, balconies or raised platforms (the latter of these must not exceed 0.3 metres in height).

Under these guidelines, the largest garden room you can build without planning permission has a maximum overall height of 4 metres, with a dual pitched roof.

There are also several guidelines relating to the land your intended build will sit on when finished. No planning permission will be needed for your intended garden room, as long as it meets the following requirements for your land:

  • It does not lead to more than half the land around the original house being covered by additions or other buildings. Here, the term “original” refers to the house as it was when it was first built, or as it stood on 1 July 1948, if it was built before this date.
  • It is only 10 square metres in area if you are intending to build it more than 20 metres from a property on designated land. Here, “designated land” refers to any area declared a National Park, part of the Broads, an Area of Outstanding Natural Beauty or World Heritage Site.

Planning permission is always required for your garden room if it:

  • Is to be built to the side of a property on designated land.
  • Is to be built within the curtilage of a listed property.

Planning permission may also be required by some local authorities if you are planning on:

  • Installing features such as a toilet.
  • Fitting an antenna to the structure.
  • Intending to use the outbuilding as a sleeping space or separate property.
  • Intending to use the outbuilding to conduct business, for instance if you are a therapist and intend to use the building as an office.

Planning Permission for Garden Room Extensions

You will most likely be able to build your garden room extension without planning permission, as long as the rules we have specified above are followed. There are also some further requirements for extensions, as they differ to fully detached outbuildings.

To ensure that no planning permission is required for your extension, you should ensure that:

  • It is no more than 4 metres in depth, if built onto the rear of a detached property, or 3 metres in depth if built onto a semi-detached property.
  • It is built from similar materials to the rest of your property.
  • It does not have a width greater than half the width of the original property, if it is a side extension. Side extensions are not permitted on Article 1 (5) Land, such as Conservation Areas or Areas of Outstanding Natural Beauty.

If you wish to build your extension so that it is open-plan (without any doors connecting it to the rest of your property), then your design will need to meet the requirements listed in the UK Building Regulations before it can be approved.

When You Will Require Building Regulations Approval

There are certain circumstances in which you will also need to have Building Regulations approval before you begin to build your perfect garden room. These also mostly relate to the size of your structure.

The largest you can build your garden room without the need for Building Regulations approval is usually 15 square metres in floor area. It should also not contain sleeping accommodation of any kind.

If the area size of your room’s floor is between 15 and 30 metres squared, you will normally not need to apply for Building Regulations approval, as long as there is no sleeping accommodation and the structure is either at least one metre from your property boundary or is constructed from suitably non-combustible materials.

Your Local Authority and Garden Room Planning Permission

If you are in any doubt at all during the process of planning your garden room, you may wish to contact your local authority and check up on their requirements. This is because many local councils’ rules will differ in terms of what falls under permitted building. For instance, some building authorities may not allow you to install a toilet in any outbuilding, or may require permission if you intend to use the structure as a place of business.

By getting in touch with your local authority, you will also be able to find out more information that’s specific to your area, no matter where you are in the UK.

To Make Your Dream Garden Room a Reality

If you have been imagining your ideal outdoor space or extension, whether for work, storage or play, and have only been held back from building it by the notion of planning permission, contact Prime Stables today. With the information you need at hand, we will be able to provide you with the garden building that fits your requirements.

Our master craftsmen are more than capable of building you a bespoke design to complete the look of your exterior, before our installation team carries out a swift delivery and puts your product together exactly where you would like it. They’ll be happy to travel anywhere in the UK, so there is no need to worry about travelling in order to pick up your purchase.

Contact us via the telephone or send us an email and one of our friendly members of staff will be glad to speak with you about placing an order. Once we have a list of your specifications, we will set to work on creating your perfect garden room.

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