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5 Extra Large Waterproof Garden Storage Boxes in the UK

Extra Large waterproof Garden Storage Box
credit: Keter

A good garden storage box can save a lot of hassle, especially if you need somewhere to keep tools, cushions, or outdoor bits safe from the rain. Extra large waterproof models are ideal for those with plenty to store and not enough shed space. They keep things tidy, dry, and easy to get to, all while blending in with your garden. Here’s a look at some of the top options that provide ample space while maintaining long-lasting sturdiness.

Exceptional

1. Keter Westwood Extra Large waterproof Garden Storage Box

4.8 out of 5
  • Capacity: 570 litres
  • Material: Weather-resistant resin
  • Colour: Brown wood panel effect
  • Lid mechanism: Hydraulic piston
  • Security: Lockable (padlock not included)
  • What We Like
  • Stores large garden tools, outdoor cushions, and seasonal accessories with ease.
  • Keeps contents dry in heavy rain while allowing airflow to prevent dampness.
  • Piston-assisted lid makes opening and closing smooth and effortless.
  • Resistant to fading, cracking, or peeling for long-lasting appearance.
  • Lightweight construction makes it simple to move when needed.
  • Complements most outdoor décor with its natural wood-look finish.

Exceptional

2. YITAHOME Large Resin Garden Storage Box

4.7 out of 5
  • Capacity: 460L
  • Material: Resin
  • Colour: Black
  • Dimensions: 141 x 68 x 60 cm
  • Special feature: Lockable
  • What We Like
  • Keeps outdoor items organised while protecting them from weather damage.
  • Hydraulic pistons allow smooth opening without heavy lifting or finger pinching.
  • Extra seating option for guests when entertaining in the garden.
  • Blends easily with various patio or outdoor furniture styles.
  • Ideal for storing pool gear, garden tools, or bulky cushions.
  • Supports up to 300 kg when used as a bench seat.
  • Easy to clean surface requires only a quick wipe down.

Exceptional

3. Keter Ontario XXL Garden Storage Box

4.7 out of 5
  • Capacity: 870L
  • Material: Plastic
  • Colour: Charcoal
  • Dimensions: 146 x 82 x 86 cm
  • Special feature: Lockable
  • What We Like
  • Huge capacity stores multiple large lounge cushions in one place.
  • Realistic wood-look finish adds warmth and charm to outdoor areas.
  • Gas pressure springs lift lid smoothly for effortless access.
  • Reinforced with metal for improved strength and long-term durability.
  • Suitable for year-round use, including during winter weather.
  • Can serve as an outdoor table thanks to its flat, sturdy lid.
  • Lightweight enough to move easily using the recessed side handles.

Exceptional

4. Olsen & Smith Extra Large Metal Storage Chest

4.6 out of 5
  • Capacity: 1000L
  • Material: Alloy steel, metal
  • Colour: Grey
  • Dimensions: 185 x 82 x 79 cm
  • Special feature: Built-in lock
  • What We Like
  • Massive size stores bulky garden furniture, tools, and outdoor accessories.
  • Galvanised steel build offers strong protection against rust and weather.
  • Gas-assisted hinges make opening and closing smooth and controlled.
  • Corner protectors prevent scratches when operating the lid.
  • Great for organising both household and garden storage needs.

Exceptional

5. Garden Gear 492L Wood-Effect Storage Box

4.5 out of 5
  • Capacity: 492L
  • Material: High Density Polyethylene
  • Colour: Wood-effect
  • Special feature: Lockable
  • What We Like
  • Sturdy double-walled design offers lasting strength and reliable performance.
  • Hydraulic pistons make opening smooth and effortless for all users.
  • Soft-close mechanism prevents accidental lid slams and reduces noise.
  • Weatherproof build keeps items safe from rain, snow, and strong sun.
  • Stylish wood-effect finish complements both modern and traditional gardens.
  • Perfect for storing tools, cushions, or seasonal garden accessories.
  • Lockable lid adds peace of mind when storing valuable outdoor items.

Are these boxes suitable for year-round outdoor use?

Yes, extra large waterproof garden storage boxes are designed to remain functional through all seasons. They withstand the wet conditions of autumn and winter as well as the heat and sun exposure of summer. Their materials and construction ensure they don’t warp, crack, or fade easily, so you can leave them outside without worry. Regular checks for damage and cleaning will keep them in good condition over the years.

What materials are these storage boxes usually made from?

Typically, these storage boxes are made from tough plastics such as polypropylene or polyethylene, or resin, which is a type of synthetic material known for its durability and resistance to weather damage. Some models might use treated or coated wood designed to resist rot and moisture, but plastic and resin are far more common due to their lower maintenance requirements. The materials used are chosen specifically to withstand exposure to UV light, rain, and frost without deteriorating.

Do they require any assembly?

Many extra large garden storage boxes are sold flat-packed for ease of transportation and usually require some assembly. The process tends to be straightforward and is often completed with basic tools, thanks to clear instructions provided by the manufacturer. However, some models come pre-assembled or partially assembled.

Can I use these boxes indoors?

Absolutely. While they are primarily designed for outdoor use, these large storage boxes can also be useful indoors for storing items in garages, sheds, or utility rooms. Their waterproof qualities mean they can protect against damp floors or accidental spills.

Are these boxes environmentally friendly?

Many manufacturers now focus on sustainability by producing storage boxes from recycled plastics. Choosing a high-quality box also means it will last longer, reducing the need for replacement and limiting waste. When the box eventually reaches the end of its life, plastic and resin materials can sometimes be recycled, contributing to environmental responsibility.

 

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