10 Best Extra Large Waterproof Garden Storage Boxes

Extra large waterproof garden storage boxes are essential for any homeowner with an outdoor space that wants to keep the area clear of any clutter. These boxes are designed to keep your garden tools, cushions, and other outdoor accessories stowed away from the elements. They are made from durable materials that can withstand harsh weather conditions and therefore keep your items dry and secure.

When looking for an extra large waterproof garden storage box, there are a few things to consider. A very important consideration is the box’s ‘waterproof’ capabilities. Make sure you choose a box that is fully waterproof to ensure that your items stay dry, even in heavy rain. 

Look for boxes with a secure locking mechanism to keep your items safe from theft. Finally, consider the box’s aesthetics. You want a box that looks good in your garden and complements your outdoor space.

Extra Large Waterproof Garden Storage Boxes – What to Look For

If you’re in the market for an extra large waterproof garden storage box, there are a few things to consider before making your purchase, as there are many box options available on the market, we have touched on some of the major points to consider above.

However, with so many choices, it still can be challenging to know which one to choose. In this buyer’s guide post, we will look at some of the best extra-large waterproof garden storage boxes available, so you can make an informed decision and find the perfect box for your needs.

Here is a recap of some key features to look for:

Size

First and foremost, you’ll want to consider the size of the storage box, something around 300-400L should be a minimum size for your extra large waterproof garden storage box. Make sure it is large enough to fit all of your garden tools, furniture cushions, and or other outdoor items that need to be stored away. Measure the space where you plan to put the storage box to ensure it will fit comfortably.

Material

When it comes to waterproof garden storage boxes, you’ll want to make sure the material is durable and can withstand the elements. Look for boxes made of materials such as resin, polyethene, or PVC. These materials are weather-resistant and won’t rust or rot.

Security

You’ll want to ensure that your items are safe and secure inside the storage box. Look for boxes with a locking mechanism or the ability to add a padlock. This will prevent anyone from accessing your items without your permission.

Ease of Use

Consider how easy it is to open and close the storage box. Look for boxes with a lid that stays open on its own, making it easy to load and unload items. Additionally, look for boxes with handles or wheels, which will make it easier to move the box around your garden.

Price

Finally, consider your budget when purchasing an extra large waterproof garden storage box. Prices can vary depending on the size, material, and features of the box. Determine how much you are willing to spend before making your purchase.

FeatureConsideration
SizeMake sure it’s large enough for your needs
MaterialChoose a durable, weather-resistant material
SecurityLook for a locking mechanism or the ability to add a padlock
Ease of UseConsider how easy it is to open, close, and move the box
PriceDetermine your budget before making a purchase

Please Note: We independently selected all the products mentioned in this Buyer’s Guide. The guide includes amongst others, Amazon affiliate links, and we may earn a commission from any purchases made through these links. For more information, please refer to our affiliate’s FAQ page.

In a Hurry?

Extra Large Waterproof Garden Storage Boxes
If you don’t have much time, use the link below to quickly find out my ‘Top Pick’ for the ‘Best Extra Large Waterproof Garden Storage Boxes’ available for you on Amazon. You can be assured we only recommend products based on our research, product quality, usability, and value for money… ‘Best Overall’- Olsen & Smith 830 Ltr / 183 Gal – Outdoor Garden Storage Box

Lifetime 500L -Extra Large waterproof garden storage boxes

Extra Large Waterproof Garden Storage Boxes: You Can Store Almost Anything In Them

Extra Large Waterproof Garden Storage Boxes – Our Top 3 Boxes

Product Image
Best Overall
Olsen & Smith 830L MASSIVE Capacity Outdoor Garden Storage Box With Padlock Plastic Shed - Weatherproof & Sit On with Wood Effect Chest (830 Litre, Anthracite)
Runner-Up
YITAHOME Garden Storage Box Waterproof, 380L Large Outdoor Storage Box with Lid, Lockable Patio Deck Boxes with Handles for Garden Tools Cushion Pillows Pool Supplies,120 x 53 x 63cm, Dark Grey
Best Budget
Outsunny 336 Litre Extra Large Outdoor Garden Storage Box, Water-resistant Heavy Duty Double Wall Plastic Container, Garden Furniture Organizer, Deck Cushion Chest with Wheels and Handles
Model/Make
Olsen & Smith
Yitahome
Outsunny
Dimensions (Internal)
154cm (L) x 74cm (W) x 73.5cm (H)
120cm (L) x 53cm (W) x 63cm (H)
122cm (L) x 17cm (W) x 62cm (H)
Size: Litres/Gallon
830 / 183
380 / 84
336 / 74
Piston Assisted
Ratton Design
Lockable
Weatherproof
Best Overall
Product Image
Olsen & Smith 830L MASSIVE Capacity Outdoor Garden Storage Box With Padlock Plastic Shed - Weatherproof & Sit On with Wood Effect Chest (830 Litre, Anthracite)
Model/Make
Olsen & Smith
Dimensions (Internal)
154cm (L) x 74cm (W) x 73.5cm (H)
Size: Litres/Gallon
830 / 183
Piston Assisted
Ratton Design
Lockable
Weatherproof
View on Amazon.co.uk
Runner-Up
Product Image
YITAHOME Garden Storage Box Waterproof, 380L Large Outdoor Storage Box with Lid, Lockable Patio Deck Boxes with Handles for Garden Tools Cushion Pillows Pool Supplies,120 x 53 x 63cm, Dark Grey
Model/Make
Yitahome
Dimensions (Internal)
120cm (L) x 53cm (W) x 63cm (H)
Size: Litres/Gallon
380 / 84
Piston Assisted
Ratton Design
Lockable
Weatherproof
View on Amazon.co.uk
Best Budget
Product Image
Outsunny 336 Litre Extra Large Outdoor Garden Storage Box, Water-resistant Heavy Duty Double Wall Plastic Container, Garden Furniture Organizer, Deck Cushion Chest with Wheels and Handles
Model/Make
Outsunny
Dimensions (Internal)
122cm (L) x 17cm (W) x 62cm (H)
Size: Litres/Gallon
336 / 74
Piston Assisted
Ratton Design
Lockable
Weatherproof
View on Amazon.co.uk

Last update on 2024-05-18

Extra Large Waterproof Garden Storage Boxes – A Buyers Guide

Olsen & Smith 830L Garden Storage Box

The simple yet tastefully designed wood-effect panelling of the Olsen & Smith 830L Garden Storage Box is a great investment for anyone looking for a spacious and weatherproof storage solution for their garden.

Garden tools, mowers, cushions, toys, games, pool equipment, small to medium garden furniture, and much more can be securely stowed away in this very large garden storage box, measuring externally 63in x 31in x 30in – (160cm x 78cm x 76cm).

Extra Large Waterproof Garden Storage Boxes - Olsen and Smith 830L

With its very large capacity, high-quality polypropylene construction, and vacuum-moulded handles, you can easily store and move your garden items around as needed in this garden box. This garden storage box has a reinforced frame and lid, which means it can support heavier items, and can also be used as a bench for up to two people. 

Arriving flat packed, the ‘assembly’ is a breeze with clear instructions provided and you should have your garden box assembled in 10 minutes or so, and only need a Philips (crosshead) screwdriver to put it together. 

This huge garden storage box (over 800L) is both weatherproof and lockable (padlock not provided). It also has ‘gas assisted pistons’ (piston assisted) and has 2 x piston units fitted, ensuring easy opening and closing.

It would be remiss of me however not to mention that some customers found, that durability may be a concern over time as the storage box is not the most sturdy or robust option available according too some. Additionally, some customers also wrote about the box’s ‘lid’ latch, which again seemed substandard to some and may require replacement after some usage.

That said, these extra large waterproof garden storage boxes have received over 80% of 4 and 5-star Amazon reviews from other customers who have purchased this outdoor storage box, which can’t be a bad thing.

Warranty from the manufacturer is only 6 months, which could be better, however, if you need versatile storage and you’re willing to invest in a reliable and spacious garden storage box, the Olsen & Smith 830L Garden Storage Box is a solid choice.

Pro’s

Con’s

Price

Three Gold Pounds Sterling
  • Very Large Capacity
  • Weatherproof
  • Reinforced Frame
  • Mobility
  • Moulded Handles
  • Gas Pistons
  • Poly Construction
  • Easy Assembly
  • Possible Durability
  • Expensive
  • Door Latch
  • Warranty

Yitahome 380 L Waterproof Garden Storage Box

If you’re looking for an extra large waterproof garden storage box that can be used indoors or outdoors and provides comfortable bench seating, the Yitahome Garden Storage Box might be the perfect fit for your needs.

This rattan-styled large garden storage box with a volume of 380L measures 47in x 21in x 25in – (120cm x 53cm x 63cm) and is a versatile and functional storage solution that provides ample space for your outdoor and or indoor storage needs. 

Extra Large Waterproof Garden Storage Boxes - Yitahome

Whether you’re looking for a place to store your gardening tools, patio cushions, or pool accessories, this extra-large waterproof storage box is sure to meet your needs. 

With its updated waterproof and UV-resistant resin, durable construction, and comfortable bench seating, for a weight capacity of 441lbst (200kg), the Yitahome garden storage box is a great investment for anyone looking to keep their outdoor space organised and clutter-free.

Other features include a ‘lockable’ (padlock not supplied) lid and hydraulic pistons, sometimes called a ‘soft close mechanism’ which will help open and close the lid slowly with the slightest of effort.

Being maintenance-free generally, the garden storage box needs only a ‘wipe down’ with a damp cloth to keep it looking tip-top.

Assembly of the YITAHOME Garden Storage Box is relatively easy and straightforward, although some users have reported that it can take a bit longer than expected. 

Overall, with a 12-month manufacturers warranty and if you’re looking for a high-quality and functional garden storage box that provides ample space and comfortable seating, the YITAHOME Garden Storage Box is definitely worth considering

Pro’s

Con’s

Price

Three Gold Pounds Sterling
  • Waterproof
  • UV Resistant
  • 4 Colours
  • Lockable
  • Hydraulic Pistons
  • Easy Clean
  • Assembly Instructions

Outsunny 336 L Large Outdoor Garden Storage Box

The Outsunny 336 Litre Extra Large Outdoor Garden Storage Box is a great solution for keeping your outdoor space tidy and organised.

Made from PVC in a double-wall construction, this box is strong, it’s spacious, measuring 25in x 48in x 24.5in (H x L x W) – (64.5cm x 122.5cm x 62cm) and weather-resistant.

The Outsunny is very easy to move around thanks to its two handles and two rollers/wheels, however, this will certainly depend on what you store in it as it will surely be ‘heavy’ if fully loaded with certain items.

Outsunny-Extra Large Waterproof Garden Storage Boxes

The hydraulic piston-assisted lid support ensures easy opening and closing, which is a good feature to have, especially when storing things ‘in’ or taking things ‘out’ of your storage box.

Overall, if you need a large, durable, and weather-resistant storage box for your garden, the Outsunny 336 Litre Extra Large Outdoor Garden Storage Box is definitely worth considering.

Pro’s

Con’s

Price

Three Gold Pounds Sterling
  • Waterproof
  • Lockable
  • Hydraulic Pistons
  • Rollers/Wheels
  • Low Maintenance
  • Non-Considering Price

SA Products 460L Weatherproof Outdoor Storage Box

The SA Products 460L Weatherproof Rattan Effect Outdoor Storage Box is perfect for those who need a very large and secure storage solution for their garden. 

This ‘lockable’ (padlock not provided) storage box adds extra peace of mind in securing your goods, while the rattan material (in 3 colours black, grey, and dark brown) gives the box an attractive appearance that blends well with garden decor.

With the internal storage box dimensions of 110cm (L) x 59cm (H) x 53cm (W) – (43in x 23in x 21in) and a large 460L capacity, you’ll have plenty of space to store furniture cushions, tools, toys, and more.

SA-Products 460L Extra Large Waterproof Garden Storage Boxes -

Assembly for most is straight forward but the lid can be difficult, especially when fitting it onto the box itself. The hinges may require sanding down to fit properly, and the joints are not waterproof, so additional waterproof tape or silicone may be necessary.

If you’re looking for a large and sturdy storage box for your garden with a price tag that will not break the bank, the SA Products 460L Weatherproof Rattan Effect Outdoor Storage Box is worth considering.

Pro’s

Con’s

Price

Three Gold Pounds Sterling
  • Very Large
  • Rattan Effect
  • Lockable
  • Easy Assembly
  • Lid Difficult To Fit
  • Joints Not Waterproof

Urbnliving Large 750L Plastic Garden Storage Box

If you’re looking for a spacious and durable garden storage box, the URBNLIVING Large Black 750L Plastic Garden Storage Box is a great option.

This very large garden storage box has a monster capacity of 750L with external dimensions of 80cm (H) x 155cm (L) x 66cm (W) – (30in x 61in x 26in) and 2 XXL storage compartments and 2 separate swing lids.

It’s made of heavy-duty plastic and has a weatherproof design, so you can store your garden tools, cushions, and other items securely.

The URBNLIVING Large Black 750L Plastic Garden Storage Box is a great investment for anyone who wants to keep their garden tools and accessories, dry, organised, and secure. 

Urbnliving Large 750L Plastic Garden Storage Box

You may find though, it is very important to follow the ‘assembly’ instructions carefully and in particular to orientate the components correctly for assembly – but thereafter it is quite simple to construct.

Virtually maintenance free and with its spacious design, weatherproof material, and two (2) lockable lids, (with padlocks, not supplied) you can store your items with confidence. However, be aware that some customers have reported issues with waterproofing and assembly, so you may need to take extra precautions when using this storage box.

Pro’s

Con’s

Price

Three Gold Pounds Sterling
  • Very Large
  • Weatherproof
  • 2 x Lockable Lids
  • Assembly Difficulties

Pluto 322L Extra Large Garden Storage Box

The Pluto Garden Storage Box is a great investment at a great price for anyone looking for a reliable, value-for-money outdoor storage solution. 

Its large capacity (322 Litres) and sturdy build make it a great choice for keeping your belongings safe and secure, while its easy assembly means you can have it up and running in no time.

With a lockable (padlock not included) ‘butterfly’ type two lid opening, weighing around 10kg (22lbs) and shipping in a black colour, which may not suit some, the Pluto has reasonable internal dimensions of (H) 55cm x 113cm (L) x 52cm (W) or 22in x 45in x 20in.

Pluto Outdoor Weatherproof Garden Storage Box

The Pluto extra large garden storage box is both strong and sturdy with a maximum carrying weight of 400kg (881 lbs) and can be used as a seat should it be needed. However, it is quite heavy (10kg/22lbs empty) and may be difficult to move around,

Overall, though if you’re looking for an extra large, weatherproof garden storage box, the Pluto Packaging Garden Storage Box is definitely worth considering.

Pro’s

Con’s

Price

Three Gold Pounds Sterling
  • Large Capacity
  • Weatherproof
  • 2 x Lockable Lids
  • Strong and Sturdy
  • 400kg max weight
  • Easy Assembly
  • Heavy To Move
  • Single Colour
  • No Padlock

Homeology TUNGSTEN 450 L Garden Storage Box

The Homeology Tungsten Garden Storage Box is made of a high-quality black polypropylene resin wood grain finish that is virtually maintenance-free and easy to keep clean.

With 2 x gas pistons for easy opening of the lid, the lockable (padlock not provided) Homeology Tungsten also has built-in steel supports that provide additional strength, making it strong enough to securely seat three people. 

Homeology TUNGSTEN Extra Large Waterproof Garden Storage Box

Weighing 18.5kg (40lbs) the Tungsten is fairly heavy to move around. However, it is fully waterproof, giving you peace of mind that the contents within will remain dry and ventilated.

With durability in mind, the hardwearing Tungsten is designed to be left outside all year round, resistant to most types of extreme weather. Its long life span means it will not need replacing every few years like rattan, wood, and other materials. It is fade-free and will not rust, dent or peel.

The Homeology Tungsten 450L extra large garden storage box comes flat-packed, complete with a 1-Year Manufacturer’s Warranty. Moulded handles allow the Tungsten to be easily moved to your chosen location. The dimensions of the box are Length: 143cm (L) x 67cm (W) x 60cm (H) – (56in x 26in x 24in), with a large capacity of 450 Litres / 119 Gallons.

Pro’s

Con’s

Price

Three Gold Pounds Sterling
  • Large Capacity
  • Warranty
  • Weatherproof
  • Lockable Lid
  • Strong and Sturdy
  • 3 Person Seat Weight
  • Gas Pistons
  • Single Colour
  • No Padlock
  • Heavy to Manoeuvre

Keter Java 1045L Large Outdoor Waterproof Deck Box

If you’re looking for a waterproof garden storage box that can hold all of your outdoor equipment, the Keter Java XXL  230 Gal (1045 L) deck box might be just what you need. 

Grey in colour, of ‘resin’ construction with a ‘Rattan’ texture finish and with interior dimensions of 52in (L) x 28in. (W) x 31in (H) – (132cm x 71cm x 78cm) This truly is a ‘monster’ box as it weighs 25.5kg (56 lbs) when empty.

Keter XXL Java Outdoor Storage Deck Box

This extra-large storage box is like no other garden storage box you may find, but is still designed to hold a wide variety of items, from gardening tools and pool equipment to outdoor furniture cushions and sports equipment with ease.

Size really is the ‘key’ feature of this storage box, and should not go unnoticed or underestimated. With a capacity of 230 Gal (1045 L), it can hold a lot, and we mean a lot, of items, making it perfect for large families or people with a lot of outdoor gear. The garden storage box is weather-resistant, which means it can withstand rain, wind, and other elements without rusting or deteriorating.

Another great feature of the Keter Java XXL is its ‘padlock lockable’ lid (padlock not provided). This makes it easy to keep your items secure and protected from theft or damage. The lid also has a ‘soft’ hydraulic piston system that makes it easy to open and close, even when the box is full.

The Keter Java XXL is also very easy to assemble. It comes with clear instructions and can be put together with just a screwdriver. Once assembled, the box is very sturdy and can be placed on any flat surface, including a deck or patio.

Overall, the Keter Java XXL 230 Gallon Deck Box is a great choice for anyone who needs extra storage space for their outdoor gear. It is large, durable, and easy to assemble, making it a great investment for any home. So if you’re looking for a high-quality garden storage box, be sure to check out the Keter Java XXL 230 Gallon Deck Box.

Pro’s

Con’s

Price

Three Gold Pounds Sterling
  • Very Large Capacity
  • Rattan Effect
  • Weatherproof
  • Lockable Lid
  • Handles
  • Gas Pistons
  • Single Colour
  • No Padlock
  • Heavy to Manoeuvre

Keter Brightwood 454L Outdoor Garden Storage Box

The Keter Brightwood 454L Outdoor Garden Storage Box is a great option for those looking for a spacious and stylish storage solution for their garden furniture cushions, garden games, accessories, garden tools, and equipment. 

Made of durable, weather-resistant, maintenance fade-free, and 60% recycled resin, the brown wood panel-style finishing looks great and will blend in well in any garden, and the 454L capacity ensures you have plenty of room to store all your items. 

Keter Brightwood 454L Garden Box

Weighing only 20kg (44lbs) when empty and with internal dimensions of 138cm (L) x 60cm (W) x 55cm (H) – (54in x 24in x 22in) the Keter Brightwood has a piston-assisted (x2) lid, making it easy to open and close. As a bonus, the Keter Brightwood comfortably seats two adults should you need extra seating, and like most garden storage boxes has the benefit of being ‘lockable’ (no padlock supplied) for added security of your goods.

While some users reported that the assembly instructions could be clearer, most found it easy to put together. Some users also reported that the lid can slam shut, though I fail to see how with gas pistons fitted, however, it’s important to be careful when using it.

Pro’s

Con’s

Price

Three Gold Pounds Sterling
  • Recycled Resin
  • Wood Panel Effect
  • Weatherproof
  • Lockable Lid
  • UV Resistant
  • Handles
  • Gas Pistons
  • Single Colour
  • No Padlock

Lifetime 60040 Outdoor Storage Box

The attractive Lifetime 60040 outdoor storage box in ‘Desert Sand’ colour is a large 492-litre garden storage box made of rigid dual-wall high-density polyethene (HDPE), this ensures that it will last for years to come.

Having internal measurements of 146cm (L) x 60cm (H) x 57cm (W) – (58in x 23in x 23in) and weighing 25kg (55lbs) it is not lightweight but it is quite stylish as far as garden storage boxes go.

With moulded handles to easily move the box around and 2 x ‘controlled’ spring hinges that allow the lid to open greater than 90°, the lid of this storage box easily opens and closes safely (will not slam shut) with minimal effort. In addition, being constructed from HDPE the UV-protected ‘weather resistant’ box will not crack, chip or peel over time.

Costway - Outdoor Storage Deck Box

With a 10-year manufacturer’s limited warranty, the garden storage it is specifically recommended for outdoor use and can be locked as most boxes can be, with a padlock (not provided), which of course is great for added security. This ‘desert sand’ colour is a great natural blending addition to any outdoor space. Although there is an alternative in grey.

Assembly is required, with some purchases finding this a little difficult but with minimal DIY skills and the correct tools, it can be put together reasonably quickly.

In summary, if you need an outdoor storage box with a large capacity, easy access, and added security, Lifetime 60040 Outdoor Storage Box is a great option to consider.

Pro’s

Con’s

Price

Three Gold Pounds Sterling
  • Very Large
  • Colour Choice
  • Water Resistant
  • Lockable Lid
  • UV Resistant
  • Handles
  • Spring Hinges
  • 10 Year Warranty
  • Water-Resistant
  • No Padlock
  • Assembly Difficulties

FAQ’s

Can Extra Large Waterproof Garden Storage Boxes Be Used Indoors?

Yes, extra large waterproof garden storage boxes can be used indoors as well, provided they fit the space and decor of the room. They can be used to store items like seasonal clothing, bedding, and sports equipment in a basement or garage.

However, it is important to note that some models may not be designed for indoor use and may not have features like ventilation.

How Do I Clean a Mouldy Extra Large Waterproof Garden Storage Box?

To clean a mouldy extra large waterproof garden storage box, first, remove all items from inside the box. Then, use a mixture of warm water and mild detergent to scrub the affected areas. Rinse the box thoroughly with clean water and let it dry completely before using it again.

Are Keter Storage Boxes Fully Waterproof?

Keter storage boxes are designed to be weather-resistant and can withstand rain, snow, and other outdoor elements. However, it is important to note that they may not be fully waterproof and may allow some moisture to enter the box, especially if the lid is not properly secured.

It is recommended to keep the box closed when not in use and to store items in waterproof bags or containers inside the box to provide an extra layer of protection.

What is the Difference Between Waterproof Garden Storage Boxes and Weather Resistant Garden Storage Boxes

The main difference between a waterproof garden storage box and a weather-resistant garden storage box is the level of protection they provide against moisture.

A waterproof garden storage box is designed to prevent any moisture from entering the box, even in heavy rain or flooding. These boxes are typically made of materials like hard plastic or resin and have airtight seals to keep water out.

On the other hand, a weather-resistant garden storage box is designed to withstand exposure to the elements, such as rain, snow, and wind, but may not be completely waterproof. 

Conclusion

Extra large waterproof garden storage boxes are a convenient and practical solution for storing outdoor items and keeping your outdoor space organised and clutter-free.

These boxes come in a variety of sizes, styles, and materials, and offer features like reinforced lids, built-in ventilation, and locking mechanisms for added security. They are designed to withstand exposure to the elements, such as rain, snow, and wind, and protect your belongings from moisture and other outdoor hazards. 

When choosing an extra large waterproof garden storage box, it is important to consider factors like the size of the items you want to store, the amount of storage space you need, and the style that best fits your outdoor decor. With proper care and maintenance, these boxes can last for several years and provide a practical and stylish storage solution for your outdoor space.

Finally, you can always pop over to our general FAQ page to possibly find out more about gardening generally, and a whole host of other potential answers to your gardening questions and queries. Don’t forget to share our Facebook page with your gardening friends, a place to get more gardening tips and tricks.