Granny annexes

While garden offices are usually designed for work, and garden sheds are focused on storage, granny annexes are created for a very different purpose. They are designed to feel much closer to a true living space.

For many families, that means creating a comfortable annexe for parents or grandparents who want to stay nearby without living in the main house. For others, it may mean adding guest accommodation or a more flexible garden building that can change with time. This is one of the main reasons why garden granny annexes continue to attract attention across the UK.

If you are looking for larger residential-style timber buildings, you can also explore our residential log cabins.

One of the biggest questions people have when considering granny annexes is simple — can they actually be used all year round? 

The answer depends on how the building is constructed. A well-designed, insulated granny annexe can provide stable indoor temperatures throughout the year, making it suitable not just for occasional use, but for everyday living. This is especially important if the space is intended for elderly family members or longer stays.

Insulation, glazing, ventilation and overall build quality all play a role here. A properly built annexe should feel comfortable in winter, not just usable in summer. That’s why many customers today choose insulated solutions from the start, rather than upgrading later  

No two households are the same, which is why bespoke granny annexes are often the most practical choice. 

Some people need a compact one-bedroom layout, while others are looking for larger granny annexes for gardens with multiple rooms, a bathroom and a kitchen area. The flexibility to adjust layout, windows, entrances and internal space makes a big difference in how the building feels long-term. 

Instead of trying to fit your needs into a fixed design, a bespoke approach allows you to create a space that works naturally — whether it’s for family, guests or even future rental use.

If you have a specific idea in mind, you can always contact our team to discuss your project.

One of the most common concerns around garden granny annexes in UK is planning permission. 

In many cases, these buildings can fall under permitted development, especially when used as an extension of the main home rather than a completely separate dwelling. However, this depends on several factors, including size, height, location and intended use.

It’s also important to understand that:

• planning permission and building regulations are separate
• electrics and utilities must still meet UK standards
• using the annexe as a permanent independent residence may require approval

For a more detailed overview, we always recommend checking official guidance or speaking with your local authority before starting your project

When comparing granny annexes for sale UK, price is naturally one of the first things people look at. However, the real value of a garden annexe depends on how comfortable and usable it will be over time.

In practice, there is a wide range of options depending on size and specification. More compact wooden structures such as the Leiden can start from around £4,167, making them a more accessible starting point for smaller spaces.

At the other end of the scale, larger and more advanced buildings like the Gandia can reach around £16,649, offering significantly more space, flexibility and potential for a fully functional living setup.

In most cases, the difference in price reflects:

• size and internal layout
• insulation level and year-round usability
• materials and build quality
• additional features such as bathrooms, kitchens or electrics

For many homeowners, the key is not to choose the cheapest option, but the one that will remain comfortable and functional for years to come

 Choosing between different granny annexes  is not just about design — it’s about trust, build quality and long-term reliability. 

At Maestro Cabins, we focus on creating wooden buildings that are designed for real use, not just appearance. Our annexes are built using quality timber and practical construction methods, with a strong focus on durability and everyday comfort.

We also provide clear information about build quality and materials through our quality guarantee.

Whether you are planning a compact garden annexe or a larger living space, the goal is always the same — to deliver something that works well now and continues to perform over time.

What are granny annexes used for?

Granny annexes are used as independent living spaces in the garden, often for family members, guests or flexible accommodation.

Do granny annexes add value to property?

 Yes, in many cases granny annexes can increase property value by adding usable living space. 

Do granny annexes need planning permission in the UK?

Sometimes no, as they can fall under permitted development. However, this depends on size, use and location.

Can I live in a granny annexe permanently?

This depends on planning rules and how the building is classified. In many cases, they are used as part of the main dwelling rather than a fully separate home.

Are granny annexes suitable for year-round use?

Yes, especially if they are insulated and built to a higher specification.

How much do granny annexes cost in the UK?

Prices vary widely depending on size, layout and features. Smaller models are more affordable, while larger, fully equipped annexes cost more.

Can granny annexes be customised?

 Yes, many bespoke granny annexes  can be tailored in terms of layout, size and features. 

How long does it take to install a granny annexe?

Prefabricated structures can often be installed relatively quickly once the base is prepared, usually within days rather than months