Best Garden Storage Box 2026: 10 Ranked, and Why a 270L Box Holds 234 Litres

This is the best garden storage box in the comparison for the simple reason that its numbers are conservative. The listing publishes internal dimensions of 143.3 by 57.9 by 61.3 centimetres. Multiplied out, that is 508.6 litres inside a chest sold as a 490L. Every other box on this page that publishes internal measurements at all either matches its label or falls short of it; this one beats its own claim by nineteen litres. At £89.99 that works out at 17.7 pence per real litre, the lowest figure here and well under half what the Keter XXL asks.

The construction earns the price too. It is polypropylene reinforced with steel rather than plain resin, the lid runs on aluminium sliding lifts instead of a gas strut that will eventually fail, and the moulded handles are on both ends so two people can shift it. External dimensions are 146.4 by 61 by 64.4 centimetres, which is a long, low footprint that sits neatly against a fence rather than dominating a small patio. The padlock hasp is integrated rather than bolted on.

Nine hundred and thirty-three ratings at 4.3 stars is the fourth deepest evidence in this group and comfortably enough to trust. The average is the joint-lowest here, and the usual complaint in a chest this size is flex in the lid when it is used as a seat — the listing makes no seating claim, which is consistent. The instruction to keep it on level ground and empty it before moving is unglamorous but honest advice that half these listings omit.

Thirteen thousand two hundred and ninety-nine ratings at 4.5 stars is not merely the deepest evidence on this page, it is five times deeper than the next box down. When a plastic chest has survived that many British winters in that many gardens at that average, the material question is settled: the 65% recycled resin does not fade, crack or go chalky, and Keter backs it for two years. It seats two adults, weighs 6.37kg empty so one person can reposition it, and the built-in handles are moulded rather than screwed.

The capacity is where you should adjust expectations. Keter publishes internal dimensions of 114.4 by 40 by 51.2 centimetres, which comes to 234.3 litres — 13% below the 270 on the label. The listing hedges the same figure a second way in its bullets, quoting "71G capacity", and 71 US gallons is 268.8 litres, so the page carries two capacity claims that disagree with its own measurements. The 40 centimetre internal depth is the number that will actually bite: it is the shallowest here by 4.6cm, and a standard garden furniture cushion is a tight fit on its side.

One smaller tell in the specification table. Maximum weight recommendation is given as "219.99 Kilograms" — two decimal places on a load limit is a machine converting 485 pounds, not an engineer measuring anything. It is the same signature as the pressure washer that publishes 1740.46 PSI. Harmless in itself, but it tells you which numbers on the page were typed and which were generated.

In a category where the specification fields are a mess, this one is clean. The title reads "416 Litre/ 110 Gallons", and 416 litres is 109.9 US gallons — the conversion is right, both units are present, and neither contradicts the other. Set that beside the Amazon Basics box below, which fills both of its capacity fields with "99 gallons" and never states a litre at all, and you can see how low the bar is here and how easily it is cleared.

The hardware is the strongest in the middle of this list. A gas cylinder holds the lid open, which matters more than it sounds when you are lifting cushions out one-handed in the rain, and the lid is rated to 220 kilograms, so it is a genuine bench rather than a chest you are told not to sit on. It assembles without tools, weighs 14kg, and the UV-resistant PP resin carries a woodgrain texture that reads better than the wicker moulding on the Amazon Basics.

What it does not publish is internal dimensions. External is 129.5 by 70 by 62.5 centimetres, which is 566.6 litres of outside volume, so the 416 litre claim implies walls thick enough to swallow 27% of the box — plausible for a genuine double-wall construction and consistent with its 14kg weight, but not verifiable the way the Keter and Charles Bentley figures are. At 4.3 stars from 2,046 ratings the evidence is the third deepest here.

Four point six stars from 2,492 ratings is the best combination of average and depth on this page, and the piston-assisted lid is the reason people keep it. A hydraulic strut on a lid this size turns a two-handed job into a one-handed one, and it stops the wind slamming 155 centimetres of resin onto your fingers. Seventy-five percent recycled content is the highest here, the wood panel effect is convincing at two paces, and it takes a padlock.

The capacity claim needs the same discount as the rest of the Keter range. Published internal dimensions are 142.4 by 62.6 by 57.9 centimetres, which is 516.1 litres against a 570L badge — a 9% overstatement, the mildest of the three Keter misses on this page. What is unusual is that the listing publishes the same measurements twice, in inches and in centimetres, inside one bullet: 56.10 by 24.65 by 22.80 inches works out at 516.7 litres, so the two systems agree with each other to within a litre. Both of them disagree with the name on the box.

At £154.25 it is the second most expensive here and costs 30 pence per real litre, against 17.7p for the Charles Bentley. What the money buys is the piston, the 62.6cm internal depth — the deepest on this page and the one dimension that decides whether bulky cushions go in flat — and a brand with 2,492 people vouching for how it looks after three winters.

The Kentwood is the exception in Keter's range and the reason it ranks here despite the thinnest review pool among the Keters. Its published internal dimensions are 81.6 by 44.6 by 56.6 centimetres, which multiply out to 206 litres against a 190L name. It is one of only two boxes on this page that claim less than they measure, and the other is the Charles Bentley at number one.

At 82.3 centimetres wide externally it is also the only genuinely small option here, which matters more than the litre count for a lot of buyers. A flat or a terrace with a two-metre balcony cannot take the 155cm Westwood or the 146cm Charles Bentley; this fits beside a door and still swallows a set of cushions, wellingtons and a bag of compost. Keter rates it as a seat and a side table, and the DecoCoat composite finish is a step up from the plain resin on the Marvel+ — it is UV protected and fade-free rather than simply weatherproof.

The caveats are proportionate. Three hundred and twelve ratings is the second thinnest sample on this page, and it is a recent listing, so there is no three-winter track record behind it yet — though 4.6 stars is the joint-highest average here. At £45.21 for 206 real litres it works out at 21.9 pence per litre, second only to the Charles Bentley, which is a genuinely good rate for the smallest box in the group.

The box itself is better than its listing. At 19.5 kilograms it is the heaviest here by 5.5kg, and in plastic garden storage weight is the closest proxy for wall thickness there is — this is double-wall resin with moulded lid hinges rather than the pinned hinges that snap after a season. Water runs off the domed lid instead of pooling, the wicker moulding hides scuffs better than a flat finish, and 799 ratings at 4.4 stars is respectable evidence.

The specification is where Amazon's own brand slips. The title says "375 Litre". Both capacity fields in the specification table say "99 gallons", and there is no litre figure in the table at all. The conversion is correct — 99 US gallons is 374.7 litres — but this is Amazon's house brand publishing American gallons to British shoppers as the only stated measure of how much the box holds. No internal dimensions are given anywhere, so the 375 litres cannot be checked; external is 122 by 63 by 61 centimetres, or 468.8 litres, which makes the claim plausible for genuine double-wall but unverifiable.

At £79.20 for an unverifiable 375 litres it is 21.1 pence per claimed litre, which looks competitive until you notice that figure is the only one on this page that has not been through the multiplication. Buy it for the build weight and the lock, not for the number on the label.

Read the fifth bullet and this is one of the most honest listings on the page: "External: 109 x 51 x 55cm | Internal: 104.7 x 49 x 53.1cm | Capacity: 270L". Multiply the internal figures and you get 272.4 litres. The label is accurate to within two litres, which only two other boxes here manage.

Then read the specification table on the same page, which states "Item Dimensions 43L x 78W x 56H centimetres". Those come to 187.8 litres, and not one of the three axes matches the bullet — not 109, not 51, not 55. The same listing publishes two external dimension sets that share no number at all. This is the pattern that shows up in nearly every category we collect: the table and the "About this item" section are maintained by different people and neither checks the other. Here the bullet is almost certainly right, since 109 by 51 by 55 externally is exactly consistent with a 272 litre interior.

As an object it is a light 5.6kg cushion chest that doubles as a bench rated to 100 kilograms, which is one adult rather than the two the Keters take. At £49.99 for a verifiable 272 litres it is 18.4 pence per real litre, second only to the Charles Bentley. Worth noting that Olsen & Smith run four near-identical 270L listings on this search, at £47.99, £48.99 and £49.99, each with its own separate pool of ratings — this is the one with the deepest pool.

The external dimensions on this listing are 109 by 51 by 55 centimetres. Those are, to the centimetre, the external dimensions Olsen & Smith publishes for its 270L box at number seven — same mould, same capacity claim, £20 apart. VonHaus charges £69.99 where Olsen & Smith charges £49.99, and unlike its twin it publishes no internal dimensions at all, so the 270 litres cannot be checked from this page.

The specification table then produces the single strangest field collected in this category. Storage Volume reads "3057.45 Cubic Metres". Three thousand cubic metres is the volume of a small warehouse, roughly eleven thousand of these boxes. The origin is visible in the digits: 109 times 51 times 55 is 305,745 cubic centimetres, and somebody has moved the decimal point two places and relabelled the unit. The correct entry would be 0.27 cubic metres. In the same table the maximum weight recommendation is given as 270 kilograms — the same number as the litres, which is capacity and load treated as though they were one quantity.

None of this makes it a bad chest. The additional base support bar is a real structural improvement over the Olsen & Smith, the two sliding bar hinges genuinely stop the lid slamming, and at 4.8kg it is easy to reposition. Five hundred and twenty-one ratings at 4.3 stars is solid. But you are paying a £20 brand premium over an identically sized box that publishes more of its specification and gets more of it right.

Wheels are the argument for this one and they are a better argument than the ranking suggests. Every other box on this page has to be emptied and lifted to move it; this one tilts and rolls, which means you can pull it out to sweep behind it or shift it under cover before a storm without unpacking the cushions first. Combined with the lockable lid and the anthracite finish that does not show algae the way pale grey does, it is a practical object.

The capacity is the tightest claim in this comparison. External dimensions are 118 by 57 by 59 centimetres, which is 396.8 litres of outside volume, and the box is sold as 350 litres. That means 88% of the external volume is being counted as usable space, and no internal dimensions are published to support it. For comparison, the Keter Marvel+ turns 297 litres of external volume into 234 of internal, or 79%, and that is with thin single-wall resin. Eighty-eight percent is achievable only with very thin walls and a lid that is genuinely flat inside, and this listing has a domed lid.

One hundred and seventy-seven ratings is by a distance the thinnest sample here — the next lowest is 312 — and there is no way to test a capacity claim on a box that publishes no internal measurement. At 4.3 stars the early feedback is fine. Buy it because it rolls, and treat 350 litres as an upper bound rather than a figure.