Enquire Now
Enquire Now
Granny Annexe

Granny Annexe

Bespoke Granny Annexes & Garden Rooms

There are many reasons why you may be considering adding a granny annexe to your property. As the name suggests, if you have an elderly relative who needs extra care and attention, a granny annexe can be the perfect solution. A self-contained living space in your garden that is designed and built to include essential amenities such as a kitchen, bathroom and living area, allows you to provide supported living and care for your loved one, with the independence necessary for everyone’s wellbeing.

But a garden annexe could also be the ideal solution if you are looking to create some extra living space for your family, accommodation for guests, or even a dedicated home office space. With the option to fully plumb, heat and light your garden annexe, and segment the space into multiple rooms, you can use this flexible outdoor space any way you like. Whatever the purpose, a granny annexe is a versatile solution that adds value to your life and your property.

granny annexe floor plans

Standalone Granny Annexe

There are many different types of granny annexe – each with its own unique benefits – but our garden annexes tick all the boxes like no other. Spacious and fully customisable, they are an affordable granny flat solution that will stand the test of time. The combination of innovative materials and building techniques guarantees a lifespan of at least 30 years, so you know you’re investing in a long-term space solution. And because they are prefabricated, our garden annexes can be assembled quickly and easily with minimal disruption to your property.

Whatever size or shape you choose, a bespoke granny annexe is a great way to add extra living space to your home without sacrificing the ground area in your garden. We offer fast, free installation nationwide, so you can start making the most of your granny annexe in a matter of weeks.

Customisable Granny Annexes & Granny Flats

One of the fantastic things about our granny annexes is that they’re fully customisable. You can choose the size, style, and layout of your garden annexe to suit your individual needs, and we can even add extra features such as windows, doors, decking, and more. We will help you think about heating and plumbing, and connecting your granny annexe to your property’s mains water and electricity supply. Our granny annexes can be designed and built to include all the necessary amenities for self-contained living, such as a kitchen, bathroom and living area. As part of our tailored service, our expert design and installation team can guide you through the whole process and help you make all the necessary arrangements for connecting your granny annexe.

Year-Round Granny Annexe

Another thing that sets our granny annexes apart from other options is their extreme versatility. Garden rooms can be used for a variety of purposes, such as an office space, extra living space or a fitness studio, as well as a granny flat. The thermally efficient materials ensure that your garden granny flat is like a home from home all year round – maintaining its heat in the winter and remaining cool and ventilated in the warmer months.

one bedroom granny annexe

We understand that a garden annexe is a significant investment, so we make sure that you get decades of use and enjoyment from your modern garden building. Each of our granny annexes is crafted using premium materials, which come with a 10-year warranty against defects and damage. We meticulously piece each element together using innovative techniques that are both withstanding and sympathetic to the environment, to promise you a minimum lifespan of 30 years.

Planning Permission for a Granny Annexe

If you’re thinking about getting a granny annexe, one of the first things you’ll need to do is check if you need planning permission. Garden annexes, for example, generally don’t require planning permission, so if you plan to use your garden room for working, relaxing and occasional use then it’s likely you can install one of our garden annexes without planning permission. However, if you intend to use your annexe as a true granny flat and make it a permanent dwelling with overnight use, then some Councils will require you to apply for planning permission. Our garden room design team have a wealth of experience when it comes to navigating technical requirements for outdoor buildings, so we can guide you through the process and help you cut through any red tape to ensure the successful installation of your granny annexe.

Get a Quote for a Granny Annexe

Whether you’re looking for extra living space for an elderly relative or just want to create a place to retreat in your garden, Modern Garden Rooms offers a range of customisable garden annexes to suit your needs. Our affordable granny flats and garden annexes are made from high-quality materials and come in various styles and sizes, all of which are completely customisable to meet your exact requirements. Get started with our online design tool and get an instant quote for a granny annexe today. Or, consult with our experienced design team in person to get ideas and inspiration for your garden annexe project.

Granny Annexe Questions & Answers

What are the benefits of a granny annexe?

There are so many benefits to investing in a granny annexe. Not only can they be a great way to provide extra care and support for elderly relatives without having to move them into a care home, but a granny flat will also give you valuable extra living space. And because many of the elements of a garden annexe are prefabricated, they can be assembled quickly and easily, with minimal disruption.

Can a granny annexe be occupied all year round?

Unlike other outdoor structures such as summer houses, sheds, cabins, garden pods and traditional brick structures, our garden annexes are specifically designed to provide a practical living space that can be used throughout the year. Our bespoke granny annexe designs include everything you need for comfort, including energy-efficient insulated walls, well-considered natural light, full wiring for lighting, heating, and power sockets, as well as plumbing and connections for toilets and utilities.

Can I customise my granny annexe?

Our core range of garden annexes can be completely customised and enhanced with additional features to achieve a layout that is a perfect fit for your needs – or our creative team can design a bespoke granny annexe for you from scratch, based on your brief. Use our online configurator to start designing your dream granny flat and get an instant price estimate today.

How long does a granny annexe last?

Purpose-built for longevity, our granny annexes are much easier and more cost-efficient to install than other timber or brick structures. We combine innovative materials with our unique construction processes to create superior quality garden annexes that promise a lifespan of 30+ years, with a 10-year guarantee on all materials.

How long does a granny annexe take to build?

We can typically design, fabricate, and install a granny annexe in as little 1 week!

How much does a granny annexe cost?

The cost of a granny annexe will vary depending on factors such as size, style, and location. All of our granny annexes are designed and built to your specific needs – whether you choose one of our core garden room designs with customisations, or decide to design a bespoke garden annexe from scratch. Our granny annexes and garden rooms start at just £12,500.

Does a granny annexe add value to your house?

As well as providing extra living space for your family and relatives, a granny annexe can also add monetary value to your property. Garden annexes, for example, can increase the value of your property by up to 20%, depending on the size and features you choose. Their flexibility gives granny annexes a universal appeal and a future-proofed solution that anyone can make great use of.

Do I need planning permission for a granny annexe?

Our garden annexes are purpose-designed to meet the planning guidelines for permanent garden buildings, adhering to necessary specifications to avoid the time and cost of a planning application. However, if you plan to live or stay in your granny annexe overnight, then you may need to notify and consult with your local Council. This process is usually straightforward and affordable and need not delay the build of your granny flat. Our expert team are happy to help you navigate this process.

Can I finance the cost of my granny annexe?

With a range of flexible finance options, we can help you manage the cost of your new granny annexe. Depending on your eligibility and deposit contribution, our partners at Pegasus Personal Finance can help you spread the cost of your garden annexe across several instalments, with flexible monthly payment options going forward.

Recent work

  • Outdoor Teenager Den – Canopy Room 4m x 2m
  • Garden Reading Nook – 3m x 2m Cube Room
  • Garden Living Room – Canopy Room 4m x 3m
  • Garden office with storage – Bespoke room 6m x 3m
  • Summerhouse – Canopy Room 5m x 4m
  • Pool Changing Area – Border Room 9m x 5m
  • Garden Gym Pod – Canopy Room 5m x 3m
  • Temporary Living Space – Bespoke Building 6m x 6m
  • Kids’ Garden Playroom – Cube Room 4m x 4m
MODERN GARDEN ROOMS LTD Registered in UNITED KINGDOM, Number 09592664 Garden Office
Top