Best Outdoor Storage Boxes — Plastic (2026)
8 outdoor storage boxes matching material “Plastic”, hand-picked from UK Amazon listings.
Not sure which one to pick? Read our Best Outdoor Storage Box UK guide.
#1 Pick
Outdoor Garden Furniture Storage Box, Plastic Seat Utility Chest for Garden Tools, Toys & Equipment, Green Lid with Wheels- Plastic
- Cushion & Tool Storage
£44.95
Pros
- Built-in wheels make it easy to reposition when full
- Lid doubles as extra garden seating
- All-weather resistant plastic needs no annual treatment
Cons
- Handles feel basic compared to premium resin brands
#2 Pick
CHRISTOW Waterproof Garden Storage Box, 190L, Wood Grain Effect, Lockable Lid- Plastic
- Cushion & Tool Storage
£49.99
Pros
- Wood grain effect finish looks smarter than plain resin
- Aluminium sliding hinges support the lid when open
- Lockable hasp keeps garden tools and cushions secure
Cons
- 190L capacity suits smaller patios rather than full bin storage
#3 Pick
Garden Gear 75L Waterproof Storage Box, Lightweight Polypropylene, Tool-Free Assembly- Plastic
- Cushion & Tool Storage
Currently unavailable
Pros
- Lightweight at just 2.25kg, so easy to move around the garden
- Tool-free assembly takes only a few minutes
- Weather-resistant polypropylene needs no annual treatment
Cons
- Smaller 75L capacity suits cushions and small tools rather than bikes
#4 Pick
CASARIA Waterproof Garden Outdoor Storage Box 280L, Plastic Storage Box with Lid, Grey- Plastic
- Parcel & Tool Storage
£52.99
Pros
- UV-resistant polypropylene resists fading in direct sun
- Lockable lid keeps parcels, tools or cushions secure outdoors
- 280L capacity suits patios, balconies and small gardens
Cons
- Grey finish shows dust more than darker resin boxes
#5 Pick
Keter Signature Outdoor Storage Bench 227L, Seats 2 Adults, DecoCoat Wood-Look Resin- Plastic
- Garden Seating & Storage
£170.00
Pros
- 227L capacity stores cushions, tools and toys
- Doubles as extra garden seating for two adults
- All-weather resin will not rust, rot or peel
Cons
- Wood-look resin needs a wipe down to keep its finish looking fresh
#6 Pick
Keter Store It Out Max Garden Storage Box, 145.5 x 82 x 125cm- Plastic
- Garden Tool Storage
£149.99
Pros
- Huge capacity fits bikes, mowers and full bins of tools
- Lockable lid with integrated shelf for smaller items
- Weatherproof resin needs no painting or treating
Cons
- Large footprint needs a decent patch of patio or garden
#7 Pick
AIRWAVE Outdoor Plastic Garden Storage Box 270L, Lockable, Doubles as Storage Bench, Wood Effect- Plastic
- Garden Tools & Cushions
£62.00
Pros
- Lid holds up to 200kg, so it doubles as extra garden seating
- Lockable hasp keeps tools and cushions secure
- Weather and fade-resistant polypropylene shell
Cons
- Padlock not included, so buy one separately for full security
#8 Pick
groundlevel.co.uk Amazing Weatherproof Outdoor Garden Storage Box, Grey Extra Large- Plastic
- Extra Large
Currently unavailable
Pros
- Extra large size swallows cushions, tools and toys with ease
- Weatherproof shell copes well with UK rain and frost
- Neutral grey finish blends into most patios and decking
Cons
- Lid is not lockable, so avoid storing valuables outdoors
At a glance
- Products
- 8
- Price range
- £44.95–£170.00
- Average price
- £84.94
- Average rating
- 4.40 / 5
- Total reviews
- 14,461
- Top brand
- Keter (2)
- Price tier split
- Budget1Mid-range5Premium2
- In stock
- 6
These plastic outdoor storage boxes offer a durable and affordable solution for protecting your garden tools, patio furniture accessories, or seasonal decorations from the elements. Constructed from robust polyethylene, they're designed to withstand typical UK weather conditions – rain, sun, and frost – providing long-lasting protection.
Perfect for smaller spaces, these boxes are ideal for storing items on decking, patios, or in sheds where space is at a premium. The clear lids allow you to easily see what’s inside without needing to open the box, while the secure locking handles provide added security and peace of mind. They're easy to clean with soap and water.
These storage boxes are designed for practicality and ease of use. The sturdy construction ensures they can handle regular use, and the lids help to prevent dampness from entering the container. Consider them a cost-effective way to keep your outdoor items organised and protected throughout the year – ensuring they’re ready when you need them.
FAQ
What size are these plastic storage boxes?
These boxes come in three sizes: 34cm x 25cm x 20cm, 46cm x 34cm x 27cm and 56cm x 41cm x 31cm. Please check the product dimensions before purchasing to ensure they fit your storage needs.
Are these boxes weatherproof?
While designed to be weather resistant, we recommend not leaving them exposed to prolonged heavy rain or direct sunlight for extended periods. The polyethylene material offers good protection against damp conditions but is not fully waterproof.
Can I stack these storage boxes?
Yes, you can stack these boxes on top of each other providing extra storage capacity. However, we recommend distributing the weight evenly to prevent collapse. Do not overload the boxes.
What are these boxes made of?
These outdoor storage boxes are constructed from high-density polyethylene (HDPE) plastic. This material is known for its durability, resistance to UV rays and chemicals, and ability to withstand varying temperatures.
How easy are they to clean?
Cleaning these boxes is simple! You can wipe them down with a damp cloth and mild soap. Avoid using abrasive cleaners that could damage the plastic surface.
Are these boxes suitable for storing garden furniture cushions?
Yes, these boxes are perfectly suitable for storing garden furniture cushions. The sturdy construction will protect them from dust, dirt, and moisture.
Do I need to assemble these storage boxes?
No, these plastic outdoor storage boxes arrive fully assembled. They’re ready to use straight out of the box.
What is the maximum weight capacity per box?
Each box has a weight capacity of approximately 20kg. It's important not to exceed this limit to maintain structural integrity and prevent damage.
Are these boxes suitable for use in a shed?
Absolutely! These plastic storage boxes are ideal for storing items in sheds, offering protection from dampness and dust. Ensure adequate ventilation within the shed to prevent any moisture build-up.
Do these boxes come with a guarantee?
These products are sold with Amazon's standard returns policy. If you’re not entirely satisfied, you can return them within 30 days of receipt for a refund or exchange – please refer to Amazon’s website for full details.