Best Extra Large Waterproof Garden Storage Box of 2026

Last updated on 03/04/2026
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Best Choice
1
9.7
Exceptional
Olsen & Smith 1000L Extra Large XL Metal Outdoor Garden Storage Box - Weather Resistant Heavy Duty Garden Box with Built In Lock - Massive Capacity Storage Chest for Tools Cushions Toys & More, Grey
Olsen & Smith

Olsen & Smith 1000L Extra Large XL Metal Outdoor Garden Storage Box - Weather Resistant Heavy Duty Garden Box with Built In Lock - Massive Capacity Storage Chest for Tools Cushions Toys & More, Grey

Why we love it
  • Weatherproof and durable construction.
  • Easy to assemble.
  • Lockable for security.
Main Highlights
  • BUILT FOR OUTDOOR USE - The Olsen & Smith large storage box is perfect for keeping your garden space neat and tidy. With a massive 1000L capacity, it is ideal for storing tools, toys and games, small to medium items of furniture, cushions, accessories and much more.
  • STRONG & SECURE: The box is features a durable and weather-resistant design, constructed with a galvanised steel frame. The gas-assisted lift hinges allow easy opening and closing, and the chest includes a built in lock with key for added security.
  • SIMPLE ASSEMBLY - The product will arrive flat-packed with easy-to-follow instructions - you can have your box ready by simply clipping the parts together, and gloves are included to help you setup safely. Please note, as this is a large storage box, we recommend assembly by 2 persons.
  • SPECIFICATIONS - Assembled dimensions: 185 x 82 x 79 cm (L x W x H), Capacity 1000L, Weight: 36.5kg. When ordering, please ensure a contact phone number is provided for our delivery partners to arrange delivery with you.
9.7
Exceptional
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Best Value
2
9.6
Superb
Save 15%
Olsen & Smith 830L XXL Garden Storage Box & Seat for 2 - Outdoor Large Plastic Weather Resistant Tool Storage Chest with Lid - Lockable - Includes Padlock | Waterproof Deck Box for Cushions & Toys
Olsen & Smith

Olsen & Smith 830L XXL Garden Storage Box & Seat for 2 - Outdoor Large Plastic Weather Resistant Tool Storage Chest with Lid - Lockable - Includes Padlock | Waterproof Deck Box for Cushions & Toys

15% OffLimited time deal
Why we love it
  • Efficient storage capacity.
  • Secured with combination lock.
  • Durable and weatherproof.
Main Highlights
  • XXL SIZE DECLUTTERS YOUR OUTDOOR SPACE: With a huge 830-litre capacity, this outdoor storage box will store all your garden cushions, furniture, tools, toys and more! This helps keep your garden organised, neat and tidy. Exclusive to Olsen & Smith, the plastic storage box also includes a removable divider so you can keep different types of items separate.
  • LOCKABLE STORAGE BOX FOR YOUR PEACE OF MIND: Unlike other Storage storage boxes with lids, Olsen & Smith provides a quality padlock to help keep the lid securely closed when not in use. This helps you keep your tool chest safe from children and animals opening and exploring! We do not recommend the storing of highly valuable items because the parts are plastic; a determined intruder with the right tools could force entry.
  • 𝐃𝐔𝐑𝐀𝐁𝐋𝐄 𝐀𝐍𝐃 𝐖𝐄𝐀𝐓𝐇𝐄𝐑 𝐑𝐄𝐒𝐈𝐒𝐓𝐀𝐍𝐓: Our Sheds and outdoor storage ranges are made from high-quality plastic to ensure durability. The plastic box is designed to be weather resistant, protecting your items from rain, snow, and UV sunlight - making it the ideal outdoor cushion storage solution.
  • 𝐒𝐓𝐘𝐋𝐈𝐒𝐇 𝐀𝐍𝐃 𝐅𝐔𝐍𝐂𝐓𝐈𝐎𝐍𝐀𝐋: This large storage box features an elegant wood effect that enhances the look of your garden. It features two gas-assisted lifting hinges to make opening and closing easier. Additionally, the outdoor storage box can double up as a bench for seating two people on the top (max weight 150kg). This makes it great Balcony furniture and Patio furniture as it maximises your space.
  • 𝐄𝐀𝐒𝐘 𝐓𝐎 𝐌𝐎𝐕𝐄 𝐀𝐍𝐃 𝐀𝐒𝐒𝐄𝐌𝐁𝐋𝐄: Despite the Massive Capacity, this outside storage box is still lightweight when empty at 16.5kg. This makes the lockable box easy to move around your garden or patio. It arrives flat-packed with simple instructions for quick and easy assembly. External Dimensions: L160 x W78 x H76 cm | Internal Dimensions: L154 x W74 x H73.5 cm | Max storage weight: 45kg | Max seat weight: 150kg
9.6
Superb
Save 15%
Limited time deal
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3
9.5
Superb
Olsen & Smith 830L XXL Garden Storage Box & Seat for 2 - Outdoor Large Plastic Weather Resistant Tool Storage Chest with Lid - Lockable - Includes Padlock | Waterproof Deck Box for Cushions & Toys
Olsen & Smith

Olsen & Smith 830L XXL Garden Storage Box & Seat for 2 - Outdoor Large Plastic Weather Resistant Tool Storage Chest with Lid - Lockable - Includes Padlock | Waterproof Deck Box for Cushions & Toys

Why we love it
  • Outdoor storage perfection.
  • Weather-resistant and durable.
  • Easy assembly, spacious capacity.
Main Highlights
  • XXL SIZE DECLUTTERS YOUR OUTDOOR SPACE: With a huge 830-litre capacity, this outdoor storage box will store all your garden cushions, furniture, tools, toys and more! This helps keep your garden organised, neat and tidy. Exclusive to Olsen & Smith, the plastic storage box also includes a removable divider so you can keep different types of items separate.
  • LOCKABLE STORAGE BOX FOR YOUR PEACE OF MIND: Unlike other Storage storage boxes with lids, Olsen & Smith provides a quality padlock to help keep the lid securely closed when not in use. This helps you keep your tool chest safe from children and animals opening and exploring! We do not recommend the storing of highly valuable items because the parts are plastic; a determined intruder with the right tools could force entry.
  • 𝐃𝐔𝐑𝐀𝐁𝐋𝐄 𝐀𝐍𝐃 𝐖𝐄𝐀𝐓𝐇𝐄𝐑 𝐑𝐄𝐒𝐈𝐒𝐓𝐀𝐍𝐓: Our Sheds and outdoor storage ranges are made from high-quality plastic to ensure durability. The plastic box is designed to be weather resistant, protecting your items from rain, snow, and UV sunlight - making it the ideal outdoor cushion storage solution.
  • 𝐒𝐓𝐘𝐋𝐈𝐒𝐇 𝐀𝐍𝐃 𝐅𝐔𝐍𝐂𝐓𝐈𝐎𝐍𝐀𝐋: This large storage box features an elegant wood effect that enhances the look of your garden. It features two gas-assisted lifting hinges to make opening and closing easier. Additionally, the outdoor storage box can double up as a bench for seating two people on the top (max weight 150kg). This makes it great Balcony furniture and Patio furniture as it maximises your space.
  • 𝐄𝐀𝐒𝐘 𝐓𝐎 𝐌𝐎𝐕𝐄 𝐀𝐍𝐃 𝐀𝐒𝐒𝐄𝐌𝐁𝐋𝐄: Despite the Massive Capacity, this outside storage box is still lightweight when empty at 16.5kg. This makes the lockable box easy to move around your garden or patio. It arrives flat-packed with simple instructions for quick and easy assembly. External Dimensions: L160 x W78 x H76 cm | Internal Dimensions: L154 x W74 x H73.5 cm | Max storage weight: 45kg | Max seat weight: 150kg
9.5
Superb
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4
9.4
Superb
Keter Store It Out Pro Outdoor Garden Furniture Storage Shed Grey| Fade Free | All Weather Resistant | Safe and Secure | Zero Maintenance | 5 year Warranty
Keter

Keter Store It Out Pro Outdoor Garden Furniture Storage Shed Grey| Fade Free | All Weather Resistant | Safe and Secure | Zero Maintenance | 5 year Warranty

Why we love it
  • Outdoor storage for varied items.
  • Ensures dry, clean stored items.
  • UV-resistant, weather-resistant material.
Main Highlights
  • Ideal outdoor storage solution for garden tools and equipment, barbecues and accessories as well as 2 x 240 litre wheelie bins
  • The base plate ensures that your stored items remain clean and dry
  • Hinged lid (with gas springs) and 2 front doors, lockable (lock not included)
  • Made from UV-resistant, weather-resistant, high-quality polypropylene (plastic), maintenance-free, easy to clean
  • Integrated shelf supports ensure that you can organise the interior of your shed as desired (shelves not included).
9.4
Superb
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5
9.2
Superb
Save 15%
Olsen & Smith Wheelie Bin Storage Shed 1170L Extra Large XL Outdoor Garden Storage Boxes with Padlock - Plastic Shed Box Cabinet Cupboard - for 2x 230L Bins, Garden Tools, Bike Storage, Toys & More
Olsen & Smith

Olsen & Smith Wheelie Bin Storage Shed 1170L Extra Large XL Outdoor Garden Storage Boxes with Padlock - Plastic Shed Box Cabinet Cupboard - for 2x 230L Bins, Garden Tools, Bike Storage, Toys & More

15% OffLimited time deal
Why we love it
  • Perfect for outdoor storage needs.
  • Weatherproof and highly durable.
  • Easy to assemble.
Main Highlights
  • Keep your outdoor space neat and organised with this 1170L garden storage shed. Designed to store 2x 230L wheelie bins, garden tools, toys, bike accessories, cushions and outdoor essentials — a versatile storage box for everyday garden clutter.
  • STRONG, WEATHERPROOF & BUILT TO LAST Constructed from durable polypropylene, this plastic garden storage shed is weather resistant and designed for year-round outdoor use. Protect tools, toys and bins from rain, wind and dirt while maintaining a tidy garden space.
  • EASY ACCESS WITH LOCKABLE SECURITY Wide double doors and a gas-assisted lift lid provide quick access to stored items. The lockable storage box includes a padlock, helping keep contents secure from animals and unwanted access.
  • FLEXIBLE PLACEMENT FOR ANY OUTDOOR AREA Lightweight yet sturdy, this outdoor storage cabinet can be positioned on patios, gardens, driveways or side passages — ideal as bin storage, bike storage, tool storage or toy storage.
  • QUICK & SIMPLE ASSEMBLY WITH XXL CAPACITY Delivered flat packed with easy clip-together panels and clear instructions for fast setup. External dimensions: 140 x 81.5 x 125cm (L x W x H) | Capacity: 1170L | Weight: 21.1kg
9.2
Superb
Save 15%
Limited time deal
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6
9.0
Superb
Keter Store it Out Nova Outdoor Garden Storage Shed, 32 x 71.5 x 113.5 cm, Light Grey with Dark Grey Lid
Keter

Keter Store it Out Nova Outdoor Garden Storage Shed, 32 x 71.5 x 113.5 cm, Light Grey with Dark Grey Lid

Why we love it
  • Spacious yet elegant storage.
  • Lockable for added security.
  • Supports shelving, heavy-duty floor.
Main Highlights
  • Ideal outdoor storage solution for garden tools and equipment, BBQ and accessories and x2 120L wheelie bins.
  • Elegant wood effect panels that opens from the top or the front and with a lockable feature for secure closure.
  • Heavy-duty floor with built-in support for shelving and 880 L capacity. Shelves not included
  • Keter Store it Out Nova Outdoor Garden Storage Shed, 132 x 71.5 x 113.5 cm, Light Grey with Dark Grey Lid.
  • Assembled dimensions: 132 x 71.5 x 113.5 cm (L x W x H) ; internal dimensions: 122 x 61 x 108.8 cm (L x W x H).
9.0
Superb
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7
8.9
Excellent
Save 15%
Olsen & Smith 680L Large Garden Storage Box - Weather Resistant Heavy Duty Garden Box with Padlock & Wood Effect - Huge Capacity Outdoor Storage Chest for Tools, Cushions, Toys & More (Anthracite)
Olsen & Smith

Olsen & Smith 680L Large Garden Storage Box - Weather Resistant Heavy Duty Garden Box with Padlock & Wood Effect - Huge Capacity Outdoor Storage Chest for Tools, Cushions, Toys & More (Anthracite)

15% OffLimited time deal
Why we love it
  • Ideal for outdoor storage.
  • Weatherproof and durable.
  • Easy assembly and relocation.
Main Highlights
  • BUILT FOR OUTDOOR USE - The Olsen & Smith large plastic storage box is perfect for keeping your garden space neat and tidy. It is ideal for storing tools, toys and games, small to medium items of furniture, cushions, accessories and much more.
  • STRONG & WEATHERPROOF - Each storage box is constructed from high-quality polypropylene that is weatherproof to protect your belongings while being able to seat two people on top. It features two gas-assisted lifting hinges to make opening and closing easier.
  • PLACE IN YOUR IDEAL LOCATION - The vacuum-moulded handles make the box easy to move around wherever it is required. The rectangular shape makes it easy to store in any location. The storage box is also lockable for added security and comes with a secure padlock to keep your items safe.
  • ASSEMBLE WITH EASE - The product will arrive flat-packed with easy-to-follow instructions, you can have your box ready by simply clipping the boxes together.
  • SPECIFICATIONS - Assembled external dimensions: 146 x 71 x 75 cm (L x W x H), Assembled internal dimensions: 140.3 x 66.6 x 72.6 cm (L x W x H), Capacity 680L
8.9
Excellent
Save 15%
Limited time deal
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8
8.9
Excellent
Save 15%
idooka Extra Large Garden Storage Box 750L – Waterproof Outdoor Box for Cushions, Toys, and Tools – Plastic Cabinet with Lid for Patio, Garage & Shed
idooka

idooka Extra Large Garden Storage Box 750L – Waterproof Outdoor Box for Cushions, Toys, and Tools – Plastic Cabinet with Lid for Patio, Garage & Shed

15% OffLimited time deal
Why we love it
  • Extra-large storage capacity.
  • Convenient two-lid access.
  • Ideal for outdoor items.
Main Highlights
  • EXTRA LARGE GARDEN STORAGE BOXES: Keep garden accessories in one location with our extra large garden storage box. A huge 750L capacity gives you lots of room to store outdoor tools, furniture cushions, boots, and toys, and the container has 2 separate lids for easy access to whatever you need.
  • VENTILATED CUSHION STORAGE: The box's slatted panels are angled to keep contents dry while providing ventilation so they don't get musty, making this particularly good storage for fabric furnishings like outdoor cushions, blankets, and rugs.
  • WEATHER RESISTANT PLASTIC GARDEN STORAGE BOX: Constructed from durable plastic that's UV, water, and frost resistant, our outdoor storage containers can handle the unpredictable British weather all year round.
  • SECURE GARDEN STORAGE SHED CONTAINER: For extra peace of mind, this outdoor storage box has 2 hinged lids that can be locked with most types of padlocks to keep your possessions safe. Please note padlocks aren't included and 2 padlocks are needed - one per lid.
  • STYLISH INDOOR AND OUDOOR ORGANISATION: The roomy storage box is a convenient way to keep your garden, patio, greenhouse, conservatory, or garage organised, with an attractive grey faux wood finish that'll match any outdoor or indoor space.
8.9
Excellent
Save 15%
Limited time deal
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9
8.8
Excellent
Olsen & Smith Garden Shed | 775L Waterproof Garden Storage Box with Lid | Small (2x 180L) Wheelie Bin Storage | Outdoor Storage Box | Small Bike Shed | Garage Storage & Tool Storage | Inc. Padlock!
Olsen & Smith

Olsen & Smith Garden Shed | 775L Waterproof Garden Storage Box with Lid | Small (2x 180L) Wheelie Bin Storage | Outdoor Storage Box | Small Bike Shed | Garage Storage & Tool Storage | Inc. Padlock!

Why we love it
  • Massive capacity for versatile storage.
  • Weatherproof design protects stored items.
  • Secure storage keeps belongings safe.
Main Highlights
  • 𝐌𝐀𝐒𝐒𝐈𝐕𝐄 𝐂𝐀𝐏𝐀𝐂𝐈𝐓𝐘: With a huge 775-litre capacity, this outdoor storage box can store two 180L slimline wheelie bins, tools, toys, and more. This helps keep your garden organised, neat and tidy. This storage cabinet has assembled external dimensions of L116 x 71 x H112.5 cm and internal dimensions of L116 x W71 x H109 cm
  • 𝐖𝐄𝐀𝐓𝐇𝐄𝐑 𝐑𝐄𝐒𝐈𝐒𝐓𝐀𝐍𝐓 𝐃𝐄𝐒𝐈𝐆𝐍: The large plastic storage box is designed to be highly weather-resistant, protecting your items from rain, snow, and harsh sunlight. This ensures that the contents stay dry and in excellent condition all year round.
  • 𝐒𝐓𝐔𝐑𝐃𝐘 𝐂𝐎𝐍𝐒𝐓𝐑𝐔𝐂𝐓𝐈𝐎𝐍: This heavy-duty storage box is made from high-quality polypropylene for enhanced durability. It features two gas-assisted lifting hinges for easier opening and closing of the lid, plus two wide-opening doors for full access to all the items stored inside.
  • 𝐒𝐄𝐂𝐔𝐑𝐄𝐃 𝐒𝐓𝐎𝐑𝐀𝐆𝐄: The storage box is lockable - ensuring that your items inside are safe and secure from theft and unauthorised access. The box also comes complete with a secure 4-digit combination padlock for extra security.
  • 𝐄𝐀𝐒𝐘 𝐓𝐎 𝐌𝐎𝐕𝐄 𝐀𝐍𝐃 𝐀𝐒𝐒𝐄𝐌𝐁𝐋𝐄: This large storage box is easy to move and reposition wherever needed. The outdoor storage cabinet arrives flat-packed with clear instructions, making assembly quick and simple.
8.8
Excellent
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10
8.7
Excellent
Save 15%
Olsen & Smith 680L Large Garden Storage Box - Weather Resistant Heavy Duty Garden Box with Padlock - Wood Effect - High Capacity Outdoor Storage Chest for Tools, Cushions, Toys & More (Anthracite)
Olsen & Smith

Olsen & Smith 680L Large Garden Storage Box - Weather Resistant Heavy Duty Garden Box with Padlock - Wood Effect - High Capacity Outdoor Storage Chest for Tools, Cushions, Toys & More (Anthracite)

15% OffLimited time deal
Why we love it
  • Spacious 680 litre storage capacity.
  • Durable and weather resistant design.
  • Stylish appearance with functional uses.
Main Highlights
  • LARGE STORAGE CAPACITY: With a large 680 litre capacity, this outdoor storage box can store your garden cushions, furniture, tools, toys and more! This helps keep your garden organised, neat and tidy. Max storage weight: 25kg. External Dimensions: W141 x D70 x H75 cm, Internal Dimensions: W139 x D70 x H72 cm. Weight: 16.75kg.
  • DURABLE AND WEATHER RESISTANT: This large storage cabinet box is made from high-quality polypropylene plastic to ensure strength and durability. It designed to be weather resistant, protecting your items from rain, snow, and harsh sunlight making it the ideal outdoor cushion storage solution.
  • SAFE & SCURE: The storage box is lockable and comes with a 3-digit combination padlock for added security for your stored items. ThSTYLISH AND FUNCTIONAL: This outside of the storage box features an elegant wood effect that enhances the look of your garden. It features two gas-assisted lifting hinges to make opening and closing easier. Additionally, it can be used as an outdoor storage bench for seating two people on the top (max weight 150kg).is protects the contents from theft and unauthorised access.
  • SAFE & SCURE: The storage box is lockable and comes with a 3-digit combination padlock for added security for your stored items. This protects the contents from theft and unauthorised access.
  • EASY TO MOVE AND ASSEMBLE: This garden tool organiser is lightweight enough for two people to lift comfortably, allowing you to move it around your garden, decking or patio. It arrives flat-packed (Please Note: Will arrive in two separate cartons) with simple instructions for quick and easy assembly. Only a screwdriver is needed, and with the simple clip-together panels you will have your storage chest ready in no time!
8.7
Excellent
Save 15%
Limited time deal
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Related Deals You Might Like for Extra Large Waterproof Garden Storage Box

📊We scanned 1881 products
🔍
We reviewed the most relevant Extra Large Waterproof Garden Storage Box offers across Amazon and leading retailers, covering major brands and models. Our shortlist features trusted names like Olsen & Smith, Keter, idooka, known for dependable quality and smart design.
⭐
To determine today's best Extra Large Waterproof Garden Storage Box, we analysed 9406 real customer and expert reviews, focusing on satisfaction, real-world performance and long-term reliability. We also weigh each review's relevance, authenticity and freshness for a fair comparison.

What we concluded:

🏆 #1
Olsen & Smith 1000L Extra Large XL Metal Outdoor Garden Storage Box - Weather Resistant Heavy Duty Garden Box with Built In Lock - Massive Capacity Storage Chest for Tools Cushions Toys & More, Grey

Our overall winner is Olsen & Smith 1000L Extra Large XL Metal Outdoor Garden Storage Box - Weather Resistant Heavy Duty Garden Box with Built In Lock - Massive Capacity Storage Chest for Tools Cushions Toys & More, Grey by Olsen & Smith. It stands out for the right balance of quality, performance and value.

✨ What sets it apart:
✓Weatherproof and durable construction
✓Easy to assemble
✓Lockable for security
💎 Best Value
Olsen & Smith 830L XXL Garden Storage Box & Seat for 2 - Outdoor Large Plastic Weather Resistant Tool Storage Chest with Lid - Lockable - Includes Padlock | Waterproof Deck Box for Cushions & Toys

The best value for most shoppers is Olsen & Smith 830L XXL Garden Storage Box & Seat for 2 - Outdoor Large Plastic Weather Resistant Tool Storage Chest with Lid - Lockable - Includes Padlock | Waterproof Deck Box for Cushions & Toys by Olsen & Smith, with consistently high satisfaction across expert and customer reviews.

💰 Best Deal
Olsen & Smith 680L Large Garden Storage Box - Weather Resistant Heavy Duty Garden Box with Padlock - Wood Effect - High Capacity Outdoor Storage Chest for Tools, Cushions, Toys & More (Anthracite)

The strongest deal right now for Extra Large Waterproof Garden Storage Box is Olsen & Smith 680L Large Garden Storage Box - Weather Resistant Heavy Duty Garden Box with Padlock - Wood Effect - High Capacity Outdoor Storage Chest for Tools, Cushions, Toys & More (Anthracite) at Olsen & Smith, currently at 15% off.

🔄Our Extra Large Waterproof Garden Storage Box ranking is updated regularly to reflect new releases and price changes—check back for the latest picks and deals.