Garden · Sizing
Garden Sheds & Storage Sizes Explained
By the Nest & Yard editorial teamUpdated 2026-08-094 min read
Our pick: the Keter Store It Out Pro Outdoor Garden Storage Shed, Beige/Brown — the best Garden Sheds & Storage we tested, from £190.00.
Choosing the right garden shed can be tricky, especially with so many different sizes available. This guide breaks down how garden sheds are typically measured and labelled – understanding terms like ‘square feet’ and ‘cubic capacity’ is key to finding a storage solution that fits your outdoor space. We'll also look at some popular options currently on Amazon UK, such as the Keter Store-It Out ranges, to help you get an idea of what’s out there and how to measure up before making your purchase.
See the full range in Garden Sheds & Storage.
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#1 Pick
Keter Store-It Out Max Outdoor Garden Storage Shed, 1200L- Resin
- Small gardens
- 145x82x125cm
Currently unavailable
Pros
- Weatherproof resin construction, no rot or rust
- Lockable doors and piston-assisted lid
- Compact footprint good for patios and small gardens
Cons
- Smaller capacity than a full-size shed

#2 Pick
Keter Store It Out Pro Outdoor Garden Furniture Storage Shed, Grey- Resin
- Small gardens
Currently unavailable
Pros
- Fade-free, all-weather resistant resin construction
- Lockable lid keeps cushions and tools secure and dry
- 5-year manufacturer warranty
Cons
- Needs a flat base for assembly

#3 Pick
Keter Store It Out Pro Outdoor Garden Storage Shed, Beige/Brown- Resin
- Small storage/bin store
- 1200L
£190.00
Pros
- Weatherproof and zero-maintenance resin construction
- Lockable for security
- Fits two 240L wheelie bins
Cons
- Not suitable as a walk-in shed — storage box format only

#4 Pick
Keter Manor Outdoor Garden Storage Shed, Grey, 4 x 3 ft- Plastic
- Garden Storage
- 4x3ft
£234.20
Pros
- Compact 4x3ft footprint suits smaller gardens
- Double-wall panels resist weathering and fading
- Includes floor panel to keep contents dry
Cons
- Limited headroom for taller items
FAQ
What do terms like '8x6' and '10x8' actually mean when describing a garden shed?
These dimensions represent the length and width of the shed in feet – for example, an 8x6 shed is eight feet wide and six feet long. It’s crucial to note that this doesn’t include the depth of the shed, which will typically be around five or six feet.
How is the internal space of a garden shed measured?
The dimensions listed usually refer to the floor area – so measuring from one corner to the opposite corner. Always check if the measurements include any roof overhangs or framing that might reduce usable space.
Which size shed would be suitable for a single person living in a small terraced house?
An 6x4 shed should provide adequate storage and workspace for a single occupant, allowing enough room for tools, gardening equipment, and perhaps a workbench. Consider the door size to ensure easy access.
What’s the difference between an Apex roof and a Lean-to shed?
An Apex roof slopes upwards from the centre, offering better protection from rain and snow compared to a Lean-to style which only has one sloping side. This impacts headroom and potentially storage space within the shed.
How do I measure my garden for a new shed?
Start by marking out the proposed footprint of the shed with string, ensuring it fits comfortably within your available space while allowing for access routes around it. Remember to factor in any existing obstacles like trees or fences.
What should I consider when thinking about headroom inside a shed?
The roof pitch significantly impacts headroom; a steeper pitch provides more height but might reduce the floor area. Ensure you have enough space for comfortable working and storing taller items.
Are there any UK regulations regarding building a garden shed?
Local planning permissions may be required depending on the size and location of your proposed shed – it’s always best to check with your local council before starting construction. They can advise if you need prior approval.
What's the minimum gap I should leave around the perimeter of a shed?
A minimum gap of 60cm is generally recommended around the base and sides for ventilation and access, allowing airflow to prevent dampness. This also provides space for accessing the shed from all sides.
How does the depth of a shed affect its storage capacity?
A deeper shed (e.g., 6x8 instead of 6x6) will provide significantly more floor space and, therefore, greater storage volume – consider your needs carefully when choosing the depth.
What are ‘outset’ sheds and how do they differ?
‘Outset’ sheds have a projecting front section, often with a small window or door. This design can offer more natural light and potentially a slightly larger internal footprint compared to a shed with a flush front.
In depth
Garden shed sizes in the UK are often presented in confusing ways, leading to frustrating misinterpretations at the point of purchase. The key is understanding what the different measurements actually represent – it’s rarely just about the overall length. Manufacturers and retailers frequently use a system that blends internal dimensions with external dimensions, and crucially, they don't always clearly define which measurement is most relevant for determining whether something will *actually* fit within your space. This section breaks down the common sizing conventions and provides guidance on how to accurately assess your garden before committing to a purchase.
The most frequently encountered size descriptions revolve around ‘internal dimensions’. These refer to the width, depth, and height of the space you’ll have inside the shed – the area where you can physically work or store items. However, the external dimensions – the overall footprint of the shed itself – are equally important, particularly if you’re considering placement against a wall, fence, or within a specific area of your garden. A shed might be described as ‘6ft wide internally’, but that only tells you how much space is available *within* the structure. To determine whether it will comfortably fit in your garden, you need to add at least 60cm (approximately 24 inches) to this figure to account for the depth of the walls and the overhang of the roof – a conservative estimate, but vital if you're planning on moving around inside the shed easily. Failing to do so is a common mistake, leading to disappointment when the shed appears significantly larger than anticipated.
Shed sizes are generally described using feet and inches (6ft 8in). One foot equals 12 inches, so a 6ft 8in shed has an internal width of 6 x 12 = 72 inches, plus an additional 8 inches for the overhang, resulting in an overall external dimension of 80 inches (approximately 6’ 7”). It's crucial to note that some manufacturers may use metric measurements alongside imperial units – for instance, you might see a width stated as 1.8m internally and 2.1m externally. Always double-check the conversion to ensure you are comparing like with like. Furthermore, consider the height of the shed; this measurement is typically given in feet and inches and refers to the distance from the floor to the apex of the roof.
Considering your household’s needs will heavily influence the appropriate shed size. A single person or a couple needing minimal storage – perhaps just garden tools and some potting soil – could comfortably manage a 6ft x 8ft (approximately 1.8m x 2.4m) shed with an internal height of 6ft 3in (approximately 1.91m). This size provides enough space for basic tasks without feeling cramped. However, families with children or those who require more storage – perhaps bikes, outdoor furniture, or sports equipment – will need a considerably larger shed. An 8ft x 10ft (approximately 2.4m x 3m) shed with an internal height of 7ft 6in (approximately 2.29m) would be a more suitable option, offering significantly increased usable space.
When measuring your garden to determine the appropriate shed size, start with accurate measurements of the area where you intend to place the shed. Don’t just eyeball it; use a tape measure and record the dimensions carefully. Take into account any existing structures – fences, walls, trees – that might affect the available space. Also, consider access routes; ensure there's enough room for delivery vehicles and easy movement around the shed once it's installed. Remember to factor in a buffer zone of at least 60cm (24 inches) on all sides to allow for the overhang and any potential adjustments. A common oversight is failing to account for ground levels – uneven ground may require some leveling work before the shed can be placed, adding both time and cost to the project.
Finally, consider the type of storage you plan to undertake. If you’re primarily storing gardening equipment, a smaller shed might suffice. However, if you need to store larger items like lawnmowers, power tools, or even small vehicles (check local regulations first!), you'll require significantly more space. Don’t be swayed by the perceived ‘value’ of a large shed if it doesn’t meet your specific storage needs; careful planning and accurate measurement are far more important than simply choosing the biggest option available. Always prioritise functionality over size, and you’ll be much happier with your garden shed investment in the long run.
The Nest & Yard editorial team
Written and reviewed by our UK-based team of home improvement and gardening writers, who research specs, pricing and customer reviews before every recommendation. Reviewed and updated on 2026-08-09.