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Granny Annexe

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First the granny annexe, then the graddy annexe!

Many people in their retirement see building a granny annexe as a great way to release equity and to move somewhere more manageable, without the soaring costs of moving home and downsizing into a flat or bungalow.

graddy annexe

These buildings can be a great way to create extra space, making use of a patch of garden and turning it into somewhere fantastic to live.

But increasingly it is not just the older generation who are turning to annexe living as a solution to their housing needs. According to the NUS over half of all students who paid full tuition fees in 2015 are back living with their parents.

The number of houses with a separate dwelling has jumped by a third since 2015. This increase can be put down to the various benefits they can bring to a property and the increase in value from increasing a property’s living space.

graddy annex interior

The benefits that older generations enjoy from annexe living are equally advantageous to boomerang children returning from university. The attraction of living close to home with the possibility to save money for a mortgage has lead to the granny annexe morphing into the so-called ‘graddy annexe’. There has been a reported 20% growth in people inquiring about these sorts of buildings for the younger generation and this number is set to rise as younger people find it more difficult to afford a deposit.

In 2018 a typical 1 bedroom flat in London can be as much as £500,000, a staggering amount that most recent graduates would not be able to afford for many years, especially if already lumbered with student loans. A one bedroom garden building can be built from £50,162 including bathroom, open plan living room and kitchen/dinner. Once graduates finally leave the comforts of home the garden building is often recommissioned as a guest room, garden office, music studio, or an annexe for the older generation.

graddy annex planning

Due to a huge growth in property prices in the south of England, many ‘graddy annexes’ are being built in southern areas such as London, Surrey and the home counties. Building these type of properties can be seen as an investment from both parties involved, allowing the younger generation to save for a deposit while allowing the property owner to add extra value to their home. These buildings also allow for a level of independence that is welcome for both parties, they have their own access to the property and do not get under each other’s feet, but it’s still pleasant to be close for family occasions.

When deciding to build an annexe in the garden it is important to think how the building will be used in the future. When designing a home for a younger family member it is wise to consider how the property will be used after they have left, and who might be the next inhabitants.

A garden home is a great way to keep families together and offers an excellent solution to the increasingly tricky housing market, be it for the older generation downsizing or the younger generation saving for a deposit.

At we are always happy to discuss whatever ideas you have for your new project, just drop us a call free on 0800 334 5774 and we can talk you through the options available.

While it is still fresh in your mind, book a no obligation site survey.

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Why a Granny Annexe could be a great option for you and your family.

A brand new home in your garden could open space that was before barely used. For the fraction of the price of a similar sized flat, you could have a spacious one or two bedroom annexe, built and decorated within 5-7 weeks.

Choosing your new granny annexe design is an exciting process and one that comes with many possibilities.

When thinking about building a property in the garden, it is important to sit down with your family and discuss what are your main criteria. How much space will you need? How large is your garden? How will your new building work in its surroundings?

We offer a range of solutions to meet our customer’s needs. Each new annexe we build is unique and designed to complement perfectly our customer’s requirements and the surrounding area it is built.

One of our most popular designs ‘Islay‘ offers great scope for building a home that suits the needs of our clientele.

granny annex planning

The Islay can be traditional in appearance with brick built cornerstones and clean rendered walls, this is a look that has proven very popular as it meets the criteria of many of our customers. It suits the surroundings of most gardens and can be designed to match the look of the main house. The Islay offers plenty of room, with a separate bedroom, bathroom and kitchen dinner/living room. The cost of the Islay starts from £72,475.08 including VAT.



For some of our customers building a garden home is a chance to design something more modern, new trends mean that options such as red cedar cladding are increasingly popular. Cladding performs well in all weather and will provide great protection for your building. It also creates a more modern look, especially when paired with darker grey window frames and doors.


Granny Annexe Cambridge

This building pictured above we built for our customer also makes the most of its surroundings through the use of its extra wide windows and bi-folding doors. A beautiful garden can be appreciated from inside this property all year round. It’s amazing the difference that large windows can make to the sense of light and space, adding to the more modern design.


How much does a granny annexe cost?

With house prices now 7.6 times higher than the average annual salary (double the amount compared with 20 years ago) multigenerational living is becoming hugely popular. It offers an alternative to downsizing, that is both less risky in the current economic climate and will certainly increase the value of any home. Our buildings are thought to add more value to the property than the cost of building the annexe, with many people searching for houses with additional living space.

Our garden homes start from as little as £55,162.85, built & decorated with kitchen, bathroom & lounge-diner. The average cost of just moving house in 2017 was £8451.49 add to this the average UK property price of £218,225, then it is apparent the massive savings that can be made.

Many of our most impressive annexes have been custom builds that were designed to meet unique requirements, we love to hear your ideas and turn them into reality.

Customising the look of your new home might also be needed to meet planning regulations, some conservation areas will require a certain type of window, cladding, tile or finish to be used, which is something to consider carefully in the design process.

Care home costs vs a granny annexe

Another consideration for some families is the cost of care homes compared to the option of building a garden home. Care home costs are extremely high in England. With current laws, the cutoff point for when people are responsible for paying for their care home charges is £23,250. If your income or capital is above this figure then it could be likely that you will pay for your care home costs. Weekly cost of care homes can vary and currently range from £250 per week to well over £1000. A 20% premium can be added when nursing care is needed.

The location will also have an effect, with care homes in the South East of England costing typically more. For a more in-depth analysis of care home costs try visiting a specialist website such as

When nursing care is less of a consideration then many people prefer the option of keeping the family closer together. A granny annexe can provide a great solution to soaring care home costs. Families like the idea that a level of independence is maintained, while still offering assistance closeby if necessary. Also, grandparents get to share in family life, often providing some level of childcare for grandchildren, often creating a win-win situation for many families.

Why choose ?

garden annex

Unlike many garden home builders, we have years of experience behind us. Our objective is to provide a perfect solution for your family and we are willing to go the extra mile to do so. We offer a free (postcode specific) no-obligation site survey at your home. During this process, we can talk to you about your requirements in detail and assess how suitable your garden will be for different designs. We also provide a full planning service to deal with any planning permission or building regulation questions.

While it is still fresh in your mind, book a no obligation site survey.

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5 great ways to make the most of your garden and annexe in spring.

When we build a property in one of our customer’s gardens we are always aware of how important it is that the two work perfectly together. A granny annexe is more than just a building, it becomes an integral part of the garden and therefore they are designed to work in perfect union. Upon doing a site survey one of the first things we do is to look at the environment in which the building will sit and then plan a design that will complement its surroundings.

Granny Annexe

Now the weather is starting to hot up let’s look at some of the great ways you can enjoy the garden and your new building!

  • 1. Bring the garden inside.

Now with modern glazing and window options, it is easier than ever to bring a sense of light and outdoor space into your home. With double and triple glazed options, doors and windows can be very large, with bi-folding and French doors ever popular. What could be better on a warm spring day than throwing open the doors and enjoying the garden?

bi-folding doors in garden annexe

  • 2. Furniture that can be used to transform your outdoor space.

Outdoor furniture comes in all shapes and sizes, from loungers to hammocks to swinging chairs, there are plenty of options to make your garden a comfy and relaxing space to be. Garden furniture can be designed to fit in with your garden home design, perhaps matching the cladding or other design features.

A hammock can be a great way to add a fun and useful lounging option for when all you want to do is lie back and relax with a cool drink. Hammocks are increasingly becoming a popular option and can be utilized indoors when the weather is bad.

Hammock hung in granny annexe

  • 3. Outdoor / indoor cooking.

Cooking outdoors on a bbq is always a great way to make the most out of a hot day and modern BBQs don’t have to be a messy experience, these days gas BBQs offer a cleaner and safer alternative to BBQing on charcoal. Having a garden annexe with great connection to the outdoors and a terrace, decking or patio area can help you make the most of cooking outside. Another option if you want a taste of the Mediterranean is building or buying an outdoor pizza oven. Delight your family with home cooked pizza and your annexe will be the hub of every social occasion.

annexe decking area

  • 4. Lawn or landscape?

A lawn can be a real treat when the weather is hotter, but sometimes it can be a lot of hard work to keep a lawn looking good and mowed regularly. Other options are available, gardens can still look great with stone slabs, meandering paths, great use of foliage and pot plants and tasteful garden ornaments. If a lawn is a must for you but you don’t want the task of maintaining it, why not try an artificial lawn. They have come a long way from the bright green eyesores of old, and now are hard to distinguish from the real thing.

Granny annexe interior

  • 5. Clever planting

Planting can have a great effect on your garden. Clever planting can connect an indoor space to the outdoors through drawing the eye into the garden. Be careful if you have a small garden not to plant something that dominates the area, smaller pot plants can be arranged to create interesting zones while some pot plants can be positioned nearer the annexe bringing greenery into your indoor space and connecting the two.

Granny Annexe


While it is still fresh in your mind, book a no obligation site survey.

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SIP Panel Construction

Granny Annexe in the Telegraph.

We were very excited to be part of an article written by the Telegraph newspaper recently. Under the heading ‘The rise of the granny annexe’ the article goes into detail about the growth in popularity of people building a garden home. It has increasingly become a fantastic solution for many families and elderly relatives – who rather going down the much more costly route of downsizing to a new property opt for the cheaper and family orientated solution of building a bespoke home in the garden.


prefab annexe


The reasons for building a garden property tend to pivot around some core motives. Families are increasingly looking for a solution that will bring a win-win situation, for elderly parents their children and grandchildren. With rising house prices, care home costs and child care, it is no wonder that people are turning to new solutions to meet their needs.

A couple in the article mentions how they are now able to help out with the grandchildren, picking them up from school and looking after them before the parents return from work. Something they greatly enjoy – yet they still retain a great deal of independence, being able to return to their cosy garden building when they would like to relax. Having separate access is very important, especially when they have their own friends visiting.


This family is one of 125,000 in the UK who are now enjoying a multigenerational way of life – with 1.8 million households, seven per cent of the country’s total, now incorporating two or more adult generations.

Granny Annexe Modern Kitchen

Whereas once downsizing to a smaller property was an option for many elderly couples, increasingly this is no longer an option due to many people over the age of 65 not holding enough equity in their homes.

“Garden buildings are an incredibly useful addition to a property, especially for older people. Properly done, they provide secure, accessible, self-contained accommodation that are ideal spaces for older residents,” says Nick Herrtage, managing director of Chester Row.

“Annexes are also among the most flexible part of a home since their size and somewhat secluded positioning – often at the rear of a garden – means they can double up as a home office or even a nursery.”

A garden building not only provides a great solution for many elderly people who are unable to afford to downsize – but also adds a great asset to the property it is built on.

“I cannot imagine a situation where this would not enhance appeal, value and saleability,” says Lindsay Cuthill of Savills.

One of our new customers, mentioned in the article, decided to build an annexe which she felt would give her all the benefits of a bungalow at a fraction of the price. “I wanted something that looked like a proper house, with vaulted ceilings and a big kitchen, so I chose an L-shaped bungalow backing on to the woods, I have my own access and a deer that visits me.”

A huge advantage of our granny annexes is the scope for building the design that best suits your requirements. There are many options when it comes to style, size layout and design, from something more traditional to something that is very modern and sleek.

garden annexe

This property we built in Surrey, mentioned in the article – demonstrates perfectly how a traditional vaulted ceiling and L -shape design can be mixed with some more contemporary aesthetics. The western red cedar cladding and urban grey french doors and windows give a contemporary and natural finish to the exterior. LED strips illuminate the Granny Annexe at night, making a striking addition to the main property.


While it is still fresh in your mind, book a no obligation site survey.

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How big is a modern Granny Annexe compared to a more expensive Bungalow?

A question often asked by new customers is ‘how large’ are the homes we build in people’s gardens.

You might be pleasantly surprised to know that our buildings are probably larger than you think and represent excellent value compared to a similarly sized bungalow.

The question of ‘how large can I have my annexe?’ is only limited by the size of your garden and possible building regulations particular to your area.

To help give you an impression of the type of size and layout we can offer, below are some examples of our most popular designs.



Height 3616mm 11.86ft
Width 6000mm 19.68ft
Depth 4000mm 13.12ft
External Area 24m2 258.33ft2

FROM (INC VAT)£55,162.85



Height 3539mm 11.61ft
Width 8000mm 26.24ft
Depth 3500mm 11.48ft
External Area 28m2 301.39ft2

FROM (INC VAT)£59,896.31



Height 3551mm 11.65ft
Width 8000mm 26.24ft
Depth 4750mm 15.58ft
External Area 33.75m2 363.28ft2

FROM (INC VAT)£72,475.08



Height 4000mm 13.12ft
Width 6500mm 21.32ft
Depth 9000mm 29.52ft
External Area 58.50m2 629.69ft2

FROM (INC VAT)£100,356.50

A typical bungalow of 35m2 for sale in our local area of Bedfordshire at this time costs approximately £275,000 ( Compare that to a similarly sized annexe built & decorated with kitchen, bathroom & lounge-diner in just 5-7 weeks for £72,475.08 inc VAT with no stamp duty! For many people part of the attraction of our buildings is the vast amount of money you can save compared to downsizing into a similarly sized bungalow.


granny annexe garden


Our ‘Islay’ building with a size of 33.75m2 boasts some exceptional features with a modern high specified kitchen and a stylish and practical bathroom. All of our buildings are constructed with Sips panels, which are highly insulated and quick to install.
Through our long partnership with several of the UK’s finest fitted kitchen makers we can provide a thoughtfully designed kitchenette or full kitchen depending on the size of your annexe, all included in our price.


 granny annexe compared to bugalow


Our buildings can be designed to fit almost any space, as long as your garden is big enough, we are able to incorporate your unique requirements and design a home that will provide a spacious, light and comfortable place to live for years to come.

While it is still fresh in your mind, book a no obligation site survey.

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Project Based In Warwickshire

When asked if we could build a home for an elderly gentleman in Warwickshire we were thrilled to help.  A bespoke garden property provided an ideal solution for the family – allowing him to maintain independence while at the same time benefiting from having family nearby to provide assistance if needed and to allow the family to stay close together.

The plot of land was set in a village location and needed to remain in keeping with the local area. A stable block at the end of garden added an extra dimension to the build with the Granny Annexe being built just in front, so the new building was designed to sympathetically work with these surroundings.

One of the key features in terms of design was to create a building with a light open-plan feeling, while still maintaining a cosiness for the winter months. To facilitate this the home was built with an airy pitched roof allowing for an open plan kitchen living space with expansive 4 metre wide glazing looking onto the garden, French doors helped provide easy access.

A bespoke kitchen was added with modern shaker style units with brushed stainless steel handles.

To complete the build a generous tiled shower room with electric shower, glass shower screen and WC were also installed.



While it is still fresh in your mind, book a no obligation site survey.

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Happy New Year from Granny Annexe

Goodbye 2017, Hello 2018!

As 2017 comes to a close we would like to look back at the year. It has been an exciting year for us here at Granny Annexe. Since introducing our new and improved annexes in late 2016, we have been able to build these new designs. These new designs have allowed us to create spacious and bright annexes with all the amenities. They have given our customers a better quality of life, by providing them with a beautiful new home, right in the heart of the family.

Early on in the year, one of our projects came to a close. A stunning cedar clad annexe very closely resembling our Lomond design, with some subtle changes made by the customer. The annexe featured on ITV’s The Home Game. The family expressed joy with their new Granny Annexe, a home that was not only a visually appealing addition to the garden, a relaxing, bright and airy space with modern kitchen/diner, wet room and bedroom.  Granny Annexe offers a variety of choices and options with our annexes so customers can give their annexes personal touches, including options for the flooring, feature walls, kitchen & bathroom styles, exterior finishing etc. The annexe featured on the show came 2nd in the competition. The 4 families featured had made changes to their homes and the prize was awarded to whoever had increased their home value the most. We are proud to say that the annexe had added its value and more to the property. Read more here.

Since we started building Granny Annexes we have received many inquires and questions from our customers one of those being “do you offer any finance options for the annexes?” Prior to 2017 we have not been able to, but, we have teamed up with Pegasus and now we can offer finance options for our products, just head on over to our blog post here to see more.

Granny Annexe Interior

Now onto something we are very pleased with and that is our 94% customer satisfaction award, awarded to us by the IWA who we work with to provide our customers with an insurance backed guarantee, giving you peace of mind should anything occur. We are only happy when we have done a good job and when our customers are happy, this award is a good sign that we have been doing that.


We hope that you have all had a wonderful Christmas, and would like to wish you a happy new year filled with joy and success.

Kind regards,

The Granny Annexe Team

Christmas Dinner

Its Christmas! (almost)

Christmas is a time of year for the whole family to get together and enjoy the company of close and extended family, some great food and maybe a little tipple too. If you have been considering the purchase of a Granny Annexe, there is no better time than now to discuss the idea of a lovely new Granny Annexe home with the family.

Christmas Dinner

For years now, we have been helping many families come together with the addition of warm, cosy, functional and beautiful new annexes to their family property. These annexes allow families to move their loved ones, young and old, closer to the family unit helping them feel more secure, together, and happy, whilst assisting in retaining a substantial level of independence. We cannot argue about the difficulty that comes with moving out from a beloved home but we can provide a perfect new home that fits your needs and requirements. Granny Annexe provides a variety of choices for a new Granny Annexe home and the option of a bespoke project. Please see our prices page to see our range of annexes and click the images for more information and an exact description of what is included. Visit our case studies page to see some completed projects, where we also have video walkthroughs and some interviews with some of our happy customers.

There are many benefits of moving closer to the family unit some of those being, having more time to spend with family, building stronger bonds and increasing social activity. It also means that there is always someone close by in case of emergency, with the added benefit of having your own space, meaning that you won’t feel like you are living on top of each other.

We are able to provide a quick build time, from when the spade hits the ground to the last coat of paint, this can all be completed within a couple of months, meaning little disruption at your property.

If you are interested in our products please give us a call, alternatively, you can request or download a brochure from our website simply by filling in a few details. Click through here to download and here to request by post.


Financing a Granny Annexe

*Click on the images below to visit the Pegasus finance page.

Many families in the UK are finding themselves in the position of caring for ageing parents or dependent family members and this is on the rise due to an ageing population. There are various avenues to explore when it comes to caring for loved ones, and many of these results in a loss of independence. At Granny Annexe we are able to offer an alternative solution which enables them to both retain a high level of independence as well as staying close to the family.

The average cost of a residential care home reaches into the realms of £120k (based on a two-and-a-half year stay). That’s a fairly high price tag that few can afford. 

A Granny Annexe provides a new home for a family member and an investment for your property. Many of our customers will consider selling their current property to fund a Granny Annexe project at a family member’s home, often leaving them with funds for their future financial security and enjoyment. Our annexes range from £55,000 – £100,000 upwards and often add significant value to the property. 

Granny Annexe Interior

For those without the option of selling a property, we have now teamed up with Pegasus to be able to provide our customers with an option for financing their projects. By using our advertised pricing or, if you have already arranged a site visit and received a quotation. You can enter the overall cost on the Pegasus website and it will calculate your monthly repayments this will vary dependent on the cost of the annexe and the duration of the loan you require.

The wonderful thing about a Granny Annexe is that it allows families to remain close and be actively involved in day to day life. As an added benefit it provides a great investment for your property. An independent property surveyor reviewed one of our projects during the TV show ‘The Home Game’ where they assessed the new annexe and it added its value back plus an extra £10,000 – £20,000 increase. 

Annexe Finance

Annexe Exterior

SIP’s! What are they?

SIP’s in the UK have only in recent decades become a noted method of construction, most commonly used in the construction of residential properties and small commercial projects, despite having existed since the 1930’s. The first instance of a SIP’s building was in Wisconsin, USA, 1937 and was even dedicated by the First Lady Eleanor Roosevelt. The building survived the harsh Wisconsin climate and ultimately stood the test of time with its removal to make way for a larger building in 1998. Since 1937 like most things developments have been made and more modern materials used resulting in panels with better insulation and structural integrity.

Wisconsin, Forest Products Laboratory, stressed skin panel building.

A SIP’s panel, simply put, is a form of insulated foam core sandwiched between 2 pieces of OSB this provides a very strong building material which has insulation built in.

There are many benefits to using SIP panels when it comes to construction, a few of those are:

Reduced build time: Due to the format of using large panels wall sections can be erected very quickly, often once a foundation has been placed and the walls ready to be put in place, the shell of a SIP building can be completed in a matter of days. One of our Granny Annexes can be completed in a matter of weeks, depending on size usually between 5-7 weeks of construction time.

Better Insulation: The panels, as it says in the name, have the insulation at the core of the building and because they can be slotted together very precisely there are much less cold bridges and the buildings are very air tight allowing for a better control over temperature.

Less wastage: SIP’s are often prepared in a factory before they are then sent to site, this allows for less wastage on site and very minimal wastage during manufacturing.

Green: The insulation for SIP’s is built into the structure, removing the need to add insulation at a later date, providing a very well insulated home reducing heating bills etc. The OSB used to construct the SIP’s is also sourced from young fast growing trees, which makes for a very renewable source and young trees can process carbon dioxide better than older trees therefore, reducing the overall CO2 emissions created.

Annexe Exterior

Peterborough Annexe Exterior

We have now worked with SIP’s for a considerable time, and we are always comforted when visiting customers and they tell us how warm and cosy their new homes feel, because of the insulation very minimal levels of heating are required to maintain a comfortable temperature in the annexe. They are also often taken aback at how quick the process is, from when the materials turn up on site to when they are able to move into the annexe. Unfortunately, we have no means of speeding up the planning process which can take between 8-12 weeks. If you want to build at a specific time of year through us, then the best thing to do is book a site survey around 4-5 months before you would like to build.

It may surprise you that even with these huge beneficial factors of using SIP’s, brick and mortar is still a more commonly used format of which to build and one of the simple answers to this is because it is still functional and it is the most widely known format for building a home. For large homebuilding companies to retrain would provide a fairly substantial cost and ultimately why fix something that isn’t broken? but we ask why not have something a bit better?

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