Insulated garden rooms are quickly changing how homeowners expand their living space. They give owners a cost-effective and versatile alternative to traditional home extensions. Not to mention cutting the installation time down significantly.
From cosy home offices to spacious fitness studios, these adaptable structures can be tailored to suit your exact needs and transform your lifestyle. But with so many options available, how do you choose the right size for your ideal garden room?
In this guide, we’ll take a look at the common varieties of insulated garden room sizes, give you some real-world examples from our previous projects and offer practical advice to help you select the perfect dimensions for your space and needs.
Different garden room sizes and layouts
Insulated garden rooms come in a range of sizes to suit different needs, from compact personal retreats to larger multi-functional spaces.
Here’s a quick snapshot of the general sizes available with typical uses and an indication of price. Bear in mind the info in the table is to give you a rough idea.
Specific pricing depends on factors such as materials used, design and any customisations. Additional features like a wired internet connection, a canopy overhang or air conditioning will also influence the final cost. Read more on garden room costs here.
| Size | Dimensions (approx) | Uses | Price range |
|---|---|---|---|
| Small | 2x2m to 3x3m | Home office, garden bar, fitness space | £12,000 – £15,000 |
| Medium | 3x3m to 4x4m | Guest room, home office, entertainment | £15,000 – £22,500 |
| Large | 4x4m and above | Multi-use (gym, office, bar), home gym | £20,000 – £30,000+ |
Below we’ll take a closer look at small, medium and large garden room sizes.
Small Insulated Garden Rooms
Small garden rooms are perfect for homeowners with limited space or those looking for a compact retreat. With sizes ranging from around 2m x 2m to 3m x 3m, these rooms provide enough space for activities like reading, light workouts or small workspaces.
A popular example from our previous work is a 2.3m x 2.2m garden bar – named Freddy’s bar after the dog! It’s one of the smallest garden rooms we’ve built and took three weeks from start to finish. It gives the owners the perfect setup for a cosy backyard social space.
Another example is a 3.2m x 2.5m room that serves as a compact yet fully functional fitness space.
- Price range: £10,000 – £15,000
- Ideal for: Garden bar, home office, gym or fitness room
- Size comparison: Similar to a small study or box room
Medium Insulated Garden Rooms
Medium-sized garden rooms are versatile spaces that offer more flexibility for various uses. Ranging from 3m x 3m to 4m x 4m, they are ideal for home offices, larger fitness areas and potentially extra guest room space.
For example, we’ve built a 4.5m x 2.5m garden room that works as a meeting space and office for a private tutor – a nice quiet spot away from the main home.
Another example is a 4.5m x 3.5m garden room used as a karaoke and entertainment space. We made sure this room had excellent soundproofing to the walls and ceiling to keep the neighbours happy! But this showcases how these sizes can be adapted for fun social gatherings.
- Price range: £15,000 – £22,500
- Ideal for: Home office, sleeping room, large fitness space, entertainment room
- Size comparison: Comparable to a small bedroom
Large Insulated Garden Rooms
For those who need more space, large garden room sizes provide ample room for a whole variety of activities. Large garden rooms tend to start from 4m x 4m and going up to 6m x 6m or larger.
A large garden room can serve one purpose or be used as a multi-use space, combining different functionalities. For example, a 5.8m x 3.6m garden room we built serves as a gym, home office and bar all in one, demonstrating the versatility of larger rooms.
For those with more specific needs, we’ve created a 7.0m x 4.0m gym, giving clients the perfect home workout setup.
- Price Range: £20,000 – £30,000+
- Ideal for: Multipurpose rooms, home gyms, entertainment spaces
- Size Comparison: Similar to a large living room or open-plan area
Customised sizes and layouts
In addition to standard garden room sizes, we offer customisable options to fit specific needs. Whether you need to fit your garden room into a particular space or require a unique layout for your desired use, customisation is always an option.
One of our projects, a 5.1m x 4.5m garden room, was designed as an extra living space, offering a flexible layout with ample room for furniture and entertainment areas. You can also add side storage rooms and overhangs for an outdoor seating area, hot tub or a plunge pool addition – why not create your own luxury wellness retreat!
Get some more brilliant garden room ideas here.
You can check out more information on our design and pricing page to see what high quality fixtures we include as standard, plus the additional extras to make it truly yours.
Choosing the right size for you
Here’s a quick guide to help you choose the perfect size for common uses:
- Home office: A small 2m x 2m room might suffice for a single-person office, but for a more comfortable or shared workspace, a 4.5m x 3.5m home office can provide the extra room you need.
- Home gym: For basic equipment, a medium room works well. However, for a full setup, a large garden room like the 7.0m x 4.0m gym we built is ideal.
- Entertainment room: Whether it’s a karaoke room or an entertainment lounge, a medium-to-large room (around 4.5m x 3.5m) provides enough space for guests, furniture and the all-important mini-fridge.
- Multipurpose space: For a room that serves multiple functions, such as a gym, office and bar, a large space of 4m plus is essential for flexibility.
Do different sizes affect planning permission?
Garden room planning permission is always a common question. In most cases, garden rooms fall under permitted development rights, meaning you won’t need planning permission if certain criteria are met.
For example, if the room is less than 2.5m in height and doesn’t cover more than 50% of your garden, you likely won’t need permission. A 2m x2m garden room and other similar-sized rooms often fit within these restrictions. However, larger rooms such as a 6m x 4m multi-use office may require additional checks, depending on the location and proximity to boundaries.
Safe to say, planning is a much simpler process with a garden room than it is with a house extension, not to mention a cheaper alternative that still maintains the highest of quality.
The good news for you is that we always take care of planning permission requirements and, if necessary, submissions on your behalf – you don’t have to worry about this at all. Read more on Why Lux and check out our process of working.
Next steps with your garden room
After taking a look at the different garden room sizes, hopefully you’ve got a better idea of what size will suit you best. Now, it’s time to bring your vision to life. If you’d like to discuss your ideas and aspirations when it comes to a garden room, give us a call or fill in our form to get a free quote.
FAQs
What is the smallest size available for an insulated garden room?
The smallest size available is usually 2m x 2m. This is a good garden room size for a cosy retreat or compact workspace.
Can I customise the size and layout of my garden room?
Yes of course. We offer a fully bespoke garden room service where you have the option to customise dimensions and layouts to suit your specific needs.
How do I determine the right size for my garden room?
Consider factors such as available space in your garden, intended use and your budget. We can also provide a consultation based on your unique requirements.
What is the largest size available for an insulated garden room?
There isn’t really an upper limit so to speak. However, some of the largest sizes can reach 7m x 5m and more. This size often gives way to a multi-purpose room covering multiple functions.
Can I add heating and cooling systems to my insulated garden room?
Yes, heating and cooling systems can be installed to ensure comfort throughout the year. We can install any form of electric panel heaters or radiators, as well as air conditioning units. See this post on best types of heating for a garden room.
Do garden rooms need foundations?
Yes, all garden rooms require a solid foundation to ensure stability and a level base. Almost all garden rooms should be able to use ground screws, which are quick to install, super strong and eco-friendly. Some rooms may require concrete foundations. Find more information on concrete vs ground screw foundations.