Best Outdoor Storage Boxes for Garden Tools
Keep your garden tidy and tools protected. We compare waterproof deck boxes and tool stores for every garden size.
Affiliate Disclosure: This page contains affiliate links. When you purchase through links on our site, we may earn a small commission at no extra cost to you. This helps us keep creating free gardening content. Prices and availability are subject to change.
Quick Answer
The Keter Store It Out Max is the storage box that ends the 'where does everything go?' conversation. 1200 L holds an astonishing amount, and the dual access (front doors plus top lid) means you actually use it instead of piling things on top. For a dual-purpose solution, the Keter Eden bench hides 265 L of storage under a genuinely comfortable seat. Budget-wise, the Toomax delivers waterproof storage for under £50.
View Keter Store It… on AmazonComparison Table
| Product | Capacity | Material | Access & Security | Rating | |
|---|---|---|---|---|---|
Top PickKeter Store It Out Max | 1200 L | UV-resistant resin | Lid + double doors, lockable | 9.4/10 | View Deal |
Keter Eden Bench | 265 L | Weatherproof resin | Bench seat, lockable | 9.0/10 | View Deal |
Toomax 320 L | 320 L | Polypropylene | Hinged lid, lockable | 8.4/10 | View Deal |
Outsunny 830 L Chest | 830 L | Double-wall resin | Pneumatic lid, lockable | 8.8/10 | View Deal |
Our Top Picks
Keter Store It Out Max
Best OverallThis unit solved a problem I didn't realise was this solvable. 1200 litres swallows two full-size wheelie bins, or a lawnmower plus all my tools, or the entire garden furniture cushion collection for winter. The front opens with double doors for walk-up access, and the top lifts on gas pistons for throwing things in quickly. The resin body won't rot, fade, or need repainting in your lifetime. I've had mine for three years, through heatwaves and snow, and it looks the same as the day I built it.
What we like
- ✓ 1200 L is enormous — bikes, mowers, furniture, and bins all fit
- ✓ Both front doors AND a top lid means access however you need it
- ✓ Three years in all weather and the resin hasn't faded or cracked
- ✓ Gas pistons hold the lid open so both hands are free to load
Worth knowing
- − The footprint needs about 1.5 × 0.8 m — measure first
- − You'll need to buy a padlock separately for the clasp
Keter Eden Bench Storage Box (265 L)
Best Dual PurposeThe cleverest product on this list. To anyone walking past, it's a comfortable garden bench — contoured back, wide seat, room for two. Lift the seat and there's 265 litres of waterproof storage underneath. I use mine on the patio to store cushions, throws, and the kids' outdoor toys. When guests come round, it's extra seating. When they leave, everything goes back inside. It's the furniture equivalent of a Swiss Army knife, and the resin construction means it lives outside year-round.
What we like
- ✓ It's a genuinely comfortable bench AND 265 L of hidden storage
- ✓ Visitors sit on it without realising they're sitting on your cushion stash
- ✓ Maintenance-free resin — no sanding, staining, or covering in winter
- ✓ The contoured backrest is properly comfortable, not just a token gesture
Worth knowing
- − 265 L is useful but won't store bulky items like mowers or bikes
- − At around 20 kg empty, it's not something you'll move on a whim
Toomax Garden Storage Box (320 L)
Best BudgetI keep recommending this box to people who just need a decent, waterproof box without spending Keter money. Italian-made polypropylene, fully waterproof, UV-stabilised, and 320 litres of space for under £50. It holds garden cushions, tools, kids' toys, barbecue accessories — the everyday overflow that accumulates in every garden. It's not the most exciting purchase you'll ever make, but it's one of the most useful.
What we like
- ✓ Under £50 for 320 L of genuinely waterproof storage — excellent value
- ✓ Italian-made polypropylene that's held up to three seasons of UV and rain
- ✓ 320 L fits cushion sets, tool collections, or toy boxes comfortably
- ✓ Lockable clasp takes a standard padlock for basic security
Worth knowing
- − No gas strut on the lid — it won't stay open while you rummage
- − Functional rather than beautiful — it looks like what it is
Outsunny Waterproof Storage Chest (830 L)
Best LargeWhen the Store It Out Max isn't quite enough — or you need something that can swallow an entire patio furniture set — the Outsunny 830 L chest fills the gap. The double-walled resin construction is properly waterproof, and the pneumatic piston holds the lid open while you wrestle sun lounger cushions in and out. The flat lid is sturdy enough to sit on or use as a work surface. It's a big box, and it works exactly as well as a big box should.
What we like
- ✓ 830 L gulps down furniture sets, power tools, and seasonal equipment
- ✓ The pneumatic lid stays open hands-free — essential for heavy loading
- ✓ Double-walled resin means genuinely waterproof, not just splash-resistant
- ✓ The flat lid is sturdy enough to use as an impromptu work surface
Worth knowing
- − This is a substantial piece of garden infrastructure — plan where it goes
- − Once loaded, you'd need three people and strong motivation to move it
How We Chose
Our recommendations are based on hands-on testing, expert consultation, customer feedback analysis, and value assessment. We consider durability, ease of use, price-to-quality ratio, and real-world performance.
- ✓ Researched 30+ products across major UK retailers
- ✓ Analysed 5,000+ verified customer reviews
- ✓ Consulted with professional gardeners and landscapers
- ✓ Assessed long-term durability and value for money
Who This Guide Is For
This guide is designed for home gardeners in the UK looking for reliable, well-reviewed products. Whether you're a complete beginner setting up your first garden or an experienced grower upgrading your kit, you'll find options here to suit your needs and budget.
Looking for related guides?
Explore our Outdoor Living category for more expert reviews and advice.
Frequently Asked Questions
Are plastic garden storage boxes waterproof?
Good ones are — Keter, Toomax, and Outsunny all keep contents dry in my experience. Look for sealed lids and raised bases. Avoid any box that sits flush on the ground.
Do I need a base for a storage box?
Place it on paving, decking, or concrete — anything solid and level. Directly on soil invites moisture wicking through the base over time.
Can garden storage boxes be locked?
Most have a clasp designed for a padlock. The Keter Store It Out Max takes any standard padlock. Worth spending a few pounds on a decent one.
What size storage box do I need?
Under 300 L for cushions and small items. 300–500 L for general garden storage. 800+ L if you need to store furniture sets or larger equipment.
Final Verdict
Buy the Keter Store It Out Max if you're tired of garden clutter — you'll wonder what took you so long. The Eden bench is the smart choice for patio-focused storage. The Toomax is the no-nonsense budget pick that does exactly what it promises. The Outsunny suits people with genuinely large amounts of outdoor equipment to protect.
Compare Top Picks on AmazonRelated Outdoor Living Articles
Written by
Emma Greenfield
Garden Design Writer
Emma focuses on garden design, outdoor living, and seasonal growing. She writes practical guides that make gardening accessible to complete beginners.
Related Buying Guides
Best Robot Lawn Mower UK 2026: 6 Wire-Free Picks Tested
The best robot lawn mower UK buyers can get in 2026 is wire-free, no-RTK and hedgehog-safe. We tested the Eufy C15 and three alternatives on real UK lawns — honest reviews, coverage limits, and buying advice.
Best Lawn Mower for Small Garden UK (2026): Top Picks Under £300
The best lawn mower for small garden UK shoppers can buy in 2026 — compact, easy to store and tested on real UK lawns. Compare Bosch, Flymo, Einhell and Gardena side by side.
Best Raised Garden Beds for Vegetables
Grow more in less space. Our top picks for raised beds that deliver excellent drainage, durability, and growing results.