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How to maximise the use of your garden space by building a Granny Annexe.

With the costs of buying a property skyrocketing in recent years, it has begun to make more sense to start looking at alternative ways to provide accommodation for our family. Often a property with a larger garden can be ideal for those wanting to make the most of that space. A granny annexe in the garden can be a benefit in a number of ways, adding extra accommodation for family members, whilst also adding value and practicality to your property.



Often the rear of a garden is an underused space, resigned to being a general dumping zone, compost bin or the site of a dilapidated shed. One sure-fire way to brighten up your garden and give it that extra wow factor is with a practical and spacious garden annexe. These fantastic buildings are designed to complement the garden space in which they are situated and provide luxury accommodation for those who live there.


Swindon gable and kitvhen2 edt


Each garden annexe we build begins from the same starting point, a chat to one of our team about your particular situation and the type and size of annexe you are looking to build. We understand that often the reason for building an annexe can be quite complex and personal. We have been building annexes for over 12 years, and with our wealth of experience, have been able to find solutions to a great variety of family housing situations, providing our customers with a superbly crafted, warm and comfortable home.


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After chatting to us about your needs and receiving a free site survey we are then in the perfect position to design an annexe home that is perfectly suited to your needs. Our in-house design team carefully go through all the notes taken in the site survey and are experts in designing an annexe that will work for your own unique requirements. Some of the key requests we get asked are to make the building future proof, adding increased disability access, making the layout wheelchair friendly, whilst all the time creating a modern, light-filled annexe home that is comfortable to live in.


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Making your annexe work in the garden space is something our designers are passionate about getting right. Additional extras such as decking, patio areas, ramps and landscaping can also help to allow an annexe to sit more comfortably in its surroundings. We design each annexe to complement its garden location, as well as meeting the requirements of any local planning regulations regarding how a new building may look in that area.




Bespoke Design

Although we do offer some core popular models, such as our Islay and Jura range, we also pride ourselves on the versatility of our buildings. Each annexe we construct is bespoke to each customer and designed to work around the needs of each individual.  It is possible for us to design extra features into any of the buildings we create, such as an increase in the number of windows and doors, adding extra storage space, changing the layout to have improved access and any number of other possibilities.

If you have a particular design idea you would like to use for your annexe then we are always very happy to discuss your ideas in more detail. We can offer a diverse range of looks and styles, with different cladding, render, roofing and windows options allowing you to create a building that is unique to you.




Render is a popular option for a lot of our customers and can be painted in any colour you choose. Your choice of window and door frame colour can have an impact on how the building looks and Upvc french doors and bi-folds can come in a great range of colours. Above is a great example of how a bolder look can be achieved through the use of darker windows frames when contrasted with a lighter render. Or alternatively, you might prefer a more traditional look, such as timber cladding, or white render with brick accents, for that cottage in the garden feel.


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Granny Flats – What are some of the things to consider when building?

A granny flat is a kind of extension to your main home that allows for self-contained accommodation. This can be a separate annexe or a building that is attached to the main home or even a separate granny flat in the house.

Most of our constructions are separate buildings, built in the garden of a property. Essentially a small bungalow which is entirely self-contained and has its own facilities such as kitchen, shower room and living room.

The size of accommodation that can be built, will depend on a variety of factors. This includes the size of your garden, local planning authority rulings and whether you are in a conservation area or not.



What are some of the considerations when building a granny flat?

  • If a granny flat is considered to be a separate dwelling, you will need to apply for planning permission.
  • Size of the annexe compared to the size of your main house. A granny flat must never be more than 50% of the total size.
  • The building needs to be considered separate and ancillary to the main building.
  • Planning authorities will want to know how the building will be used and who will be using it.
  • Planning permission for an annexe will only ever be granted for a family member.


Every local planning authority is slightly different and might ask for varying requirements for fulfilling the application. At Granny Annexe we use a specialist planning company who is familiar with the planning process for annexes and granny flats and know how different local planning authorities work and particular requirements for certain areas. We offer a complete turnkey service meaning that we take care of every aspect of the build from start to finish. We can submit an application on the client’s behalf at an additional cost of £1672.00 inc VAT.



Unlike some companies, we do not recommend using the Caravan Act instead of obtaining planning permission. This is because, in order to build under the Caravan Act, a building needs to be classed as temporary and mobile. Our annexes are neither of these things and we believe a home should be a solid and permanent structure. As such our buildings are constructed using solid concrete pad foundations and robust structurally insulated panels.

It is important to choose a company that understands the process and is able to design a building that will comply with certain LPA regulations. We have designed 1000’s of granny annexe for customers all over the country taking into consideration particular planning requirements. The requirements might include external design such as the colour of the render, cladding in particular colours or whether it is a flat-roofed or pitch-roofed building.


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Is my garden suitable for a granny flat?

In order to have an annexe built in the garden, there are a number of things to consider to determine if your property is suitable for this sort of building. Some of the main considerations are whether your garden is big enough, where your main house’s services are located, and where your house is located in relation to neighbouring buildings.

Size of garden

Your garden would need to be at least around 5 – 6 metres wide to accommodate a granny annexe in the garden. Most peoples gardens are of the long and thin variety meaning that an annexe can be positioned lengthways rather than longways to fit in a narrower space.

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Typically the narrowest annexe we build is 3500mm and there would need to be a least 1 metre of space either side of the annexe to the boundary. We are able to design buildings that will work in a huge variety of spaces, so even if you think your garden might not be suitable, it can still be a good idea to phone us and check in case there is something we can suggest.

Another option when considering a granny flat in a smaller garden might be to opt for an annexe extension instead. A granny flat extension uses the same building techniques as our normal annexe buildings but with the advantage of being connected to your main house. This can be beneficial in a number of ways. Firstly our specially designed single storey extensions can often be built within permitted development. Secondly, if you have a small garden then an annexe extension might help you to make the most of your garden space. Thirdly an annexe extension can create a more versatile building that can be used for a number of functions if the house is sold later.



Even though annexes are ancillary buildings they still, in most cases, share services with the main home. Electricity, water and sewage connection is included in the price of our buildings up to 20m. In some cases where connecting to the sewage is not possible, then a septic tank can be installed instead. It is also possible to install separate meters for each property in case you require separate billing.  With this in mind, how your main properties services are laid out is a clear consideration when we are doing a site survey and planning the design of a new granny flat.


Location Location Location

Certain locations require some special requirements when it comes to planning and local authorities. If you are living in a conservation area or an area of outstanding natural beauty then there might be additional conditions asked from the planning authority regarding the look and design of the building. Also, the proximity to neighbours can have a bearing on the design of a building. Neighbours might ask for a certain material or colour to be used or the height of the building might be affected if the building is very close to the boundary.


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granny annexe brochure




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