Call Free: 0800 334 5774
Call Free: 0800 334 5774


NEW Granny Annexe extension designs!

At Granny Annexe, we are always adapting and evolving the design of our buildings. We specialise in creating bespoke buildings that are designed around the needs and requirements of each customer. No two gardens or people are the same and we recognise that in the annexes we construct.

In order to provide even more versatility, we have introduced a brand new range of buildings, called our Annexe Extensions range. Built to the same very high standards as our normal annexes, extensions can provide a number of advantages.


Sometimes on rare occasions, we have found some people have been denied planning permission for a normal annexe in the garden. This might be due to a number of reasons, such as neighbour’s concerns, being in a conservation area or not having a large enough garden. An annexe extension has the chance of meeting planning regulation more easily, and in some cases might be built under permitted development.

All of our annexe extensions are flat-roofed, single storey buildings, constructed using the same high performing energy efficient ‘SIP’ (structurally-insulated-panel) construction technique. With our complete turnkey service, you can save time and money. You will not have to deal with planning authorities, architects or builders, instead we will take care of everything for you from the planning stages to handing you the keys.


Due to our modular construction techniques, you can also take advantage of our rapid construction, with most buildings being completed in 5 – 7 weeks. Building works can be disruptive and stressful, we try to minimise this as much as possible with a process we have developed an honed over a number of years. Part of the construction process takes place off-site in our workshops in Bedfordshire. We then transport the SIP panels to your home and begin construction once all foundations and ground works are completed. This allows for a fast turnaround offering you a smooth and stress-free building process.

Independent living in the heart of the family

Despite being attached to the main home, our annexe extensions still offer the same level of independent living as our standard annexes. We have designed both the main house and the extension to have it’s own individual access to the garden, perfect for independent living.


Example 1 – The Studio Annexe Extension


Our studio extension is perfect for those with a smaller garden and is designed especially for an attached property. The clever design allows for an open plan living space, with a separate deluxe shower room and a bedroom tucked away from the living room. Large French doors open into the garden, flooding the extension with light, providing wonderful views of the garden.


Interior space is arranged in order to maximise the space available, with an open plan feel, that connects the main living area to the garden, with a studio bed area tucked around the corner. Separate access for both the annexe and the main house is a key feature of all our extensions in order to provide an independent living solution, whilst still being connected to the main home.


WxDxH 4.0m x 6.0m x 3.08m

External Area 24m2

£58,700 inc. VAT


Example 2 – The double bedroom Annexe Extension


Our larger double bedroom extension has been designed as a suitable size and layout for a detached property and boasts a generous 32m2 external area. This provides space for an open plan living room, with a separate double bedroom and a deluxe shower room. Large French doors are a great feature for increasing the feeling of space and light. and allows for excellent flow between your outdoor and indoor spaces.


Our layout can be configured in a number of ways in order to meet your own requirements. Below is an example of a suitable floor plan that creates a light-filled open plan living space, with separate access to the garden.


WxDxH 4.0m x 8.0m x 3.08m

External Area 32m2

£69,600 inc. VAT


Example 3 – The Wrap-around Annexe Extension


Our wrap-around extension is perfect for those wanting to make the most of a garage or side return, turning this space into versatile independent living accommodation. The practical L-Shaped design incorporates an open plan living space, with kitchenette a separate double bedroom and either an ensuite or separate deluxe shower room.


Plenty of space is available with the L-Shaped design allowing for the layout to be configured in a number of ways. In our example below, both the bedroom and the living area face the garden, with plenty of space for an open plan living area.


WxDxH 7.0m x 6.0m x 3.08m

External Area 30m2

£68,600 inc. VAT


Versatility and Style

A granny annexe extension is an adaptable and versatile building that can be designed to compliment your own unique requirements. We can configure the extension to fit perfectly with your existing home and are always on hand to provide information and discuss design ideas. If you require a bespoke design we can help and advise accordingly. All the extensions we build are flat roofed single storey designs with an external render finish in a choice of colours, all grounds works are included in the price.


While it’s fresh in your mind why not download a free brochure

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