Best Outdoor Storage Box Under £300
Keep your garden tidy and your tools dry with a durable outdoor storage box that won't break the bank. We have analysed specs, owner reviews, and brand reliability to find the best options under £300.
Quick answer
The Keter Store-It-Out is our top pick for its excellent weather resistance, 300-litre capacity, and reliable gas-lift lid. For a budget-friendly option with solid build quality, the Suncast 235-litre deck box offers great value for smaller spaces.
Why trust ToolBuyerHub
- Tested on specs (capacity, material, weight rating)
- Weather resistance & UV protection compared
- Aggregated owner reviews from major retailers
- Build quality & warranty checked
- Brand reliability across garden storage ranges
- No fake hands-on claims
Research updated June 2026.
Keter Store-It-Out
Best balance of capacity, durability, and value under £300
| Product | Best For | Capacity | Rating | Price |
|---|---|---|---|---|
| Keter Store-It-Out | Best Overall | 300 L | 4.7 / 5 | Check |
| Suncast 235L Deck Box | Best Budget | 235 L | 4.5 / 5 | Check |
| Lifetime 60024 Horizontal Box | Best Durability | 250 L | 4.6 / 5 | Check |
| Keter Corfu 320L | Best Capacity | 320 L | 4.6 / 5 | Check |
| Forest Garden 4x3 Pressure Treated | Best Wooden Option | 350 L | 4.4 / 5 | Check |
Keter Store-It-Out
Best OverallPros
- Gas-lift lid for easy access
- Weather-resistant and UV-protected
- Assembly in under 30 minutes
Cons
- Not fully waterproof (seal is good but not perfect)
- Plastic can feel slightly hollow
The Keter Store-It-Out is a perennial favourite among UK gardeners for good reason. Its 300-litre capacity comfortably holds two large patio cushions, a set of garden tools, and a bag of compost. The resin construction is resistant to rust, rot, and UV damage, meaning it will look good after several British summers.
Owner reviews consistently praise the gas-lift lid, which stays open securely and prevents finger-trapping. Assembly is straightforward with no tools required for the main structure. While not completely waterproof, the lid seal keeps contents dry in all but the heaviest downpours, making it the most reliable all-rounder under £300.
Suncast 235L Deck Box
Best BudgetPros
- Very affordable price point
- Lightweight and easy to move
- Good UV resistance for colour retention
Cons
- Smaller capacity than some competitors
- Lid is not gas-lift (needs prop)
Suncast is known for producing reliable, budget-friendly garden storage, and the 235L deck box is no exception. It offers a solid 235-litre capacity that is ideal for storing cushions, small tools, and children's outdoor toys. The resin material is UV-stabilised to prevent fading, and the box includes a lockable hasp for security.
Owner feedback highlights the ease of assembly and the lightweight design, which makes it simple to reposition around the garden. The main compromise is the lid, which requires a manual prop to stay open, unlike the gas-lift mechanism on the Keter. For the price, it is a dependable choice for smaller gardens or tighter budgets.
Lifetime 60024 Horizontal Storage Box
Best DurabilityPros
- Heavy-duty HDPE construction
- High 120 kg weight limit
- UV-protected and weather-resistant
Cons
- Lid can be heavy for some users
- Assembly requires more effort
Lifetime products are renowned for their robust construction, and the 60024 horizontal storage box is built to last. Made from high-density polyethylene (HDPE), it is virtually indestructible under normal use and can support up to 120 kg on its lid, making it suitable for use as a bench or extra seating. The 250-litre capacity is well-suited for larger tools or multiple cushions.
Owner reviews note that the box feels significantly more solid than standard resin models. The UV protection ensures the colour stays vibrant even in direct sunlight. The main drawback is the lid weight, which some users find heavy to lift, and assembly is more involved than with simpler designs. For those prioritising longevity and strength, this is a top contender.
Keter Corfu 320L
Best CapacityPros
- Largest capacity in this price range
- Gas-lift lid for easy access
- Attractive wood-effect design
Cons
- Larger footprint may not suit small spaces
- Plastic can feel thin on side panels
If you need maximum storage space, the Keter Corfu 320L delivers the largest capacity available under £300. It can easily accommodate a full set of garden furniture cushions, a lawnmower, or multiple bags of compost. The wood-effect resin finish gives it a premium look that blends well with natural garden settings.
Like the Store-It-Out, it features a gas-lift lid for effortless opening. Owner reviews praise the generous internal space and the ease of assembly. Some users note that the side panels feel slightly less rigid than the top, but overall build quality is good. It is an excellent choice for larger families or those with extensive garden equipment.
Forest Garden 4x3 Pressure Treated Wooden Box
Best Wooden OptionPros
- Natural wood aesthetic
- Very high weight capacity
- Pressure-treated for rot resistance
Cons
- Requires annual treatment
- Heavier and more difficult to assemble
For those who prefer a natural look, the Forest Garden pressure-treated wooden box offers a traditional aesthetic that resin boxes cannot match. Made from FSC-certified timber, it is pressure-treated to resist rot and insect damage, giving it a lifespan of up to 15 years with proper maintenance. The 350-litre capacity is generous, and the lid can support up to 150 kg.
Owner reviews highlight the robust feel and the ability to customise with paint or stain. The main considerations are the need for annual wood treatment and the more complex assembly process compared to plastic boxes. It is heavier and not as portable, but for a permanent garden fixture, it offers unmatched durability and charm.
What to check before buying an outdoor storage box
Choosing the right outdoor storage box involves more than just picking the cheapest option. Consider the following factors to ensure you get a box that meets your needs and lasts for years.
Material: Resin (plastic) boxes are lightweight, rust-proof, and require no maintenance. Wooden boxes offer a natural look but need annual treatment. HDPE is a more durable plastic option. Consider your garden's exposure to sun and rain when deciding.
Capacity and dimensions: Measure the space where you plan to place the box. Ensure the box's footprint fits, and consider the internal capacity for your items. A 300-litre box can hold two large patio cushions or a set of garden tools. Check the weight limit on the lid if you plan to use it as seating.
Weather resistance: Look for UV protection to prevent fading and a good lid seal to keep out rain. Most resin boxes are water-resistant but not fully waterproof. For complete protection, consider a box with a rubber gasket seal.
Lid mechanism: Gas-lift lids are the most convenient, staying open without manual support. Some boxes use a simple prop or have no support at all, which can be less user-friendly. Consider who will be using the box and how often.
Mistakes to avoid when buying a storage box
Many buyers make common errors that lead to dissatisfaction. Here are the key mistakes to avoid.
Ignoring assembly requirements: Some boxes require significant assembly with tools. Check reviews for assembly difficulty. If you are not DIY-inclined, look for boxes that snap together without tools.
Assuming all plastic boxes are the same: Not all resin is equal. Cheaper boxes may use thinner plastic that can crack in cold weather or warp under direct sun. Stick to reputable brands like Keter, Suncast, and Lifetime for consistent quality.
Forgetting about security: If you store valuable tools, ensure the box has a hasp for a padlock. Many budget boxes lack this feature. Check if the lid can be locked securely to prevent theft or children accessing dangerous items.
FAQs
Are outdoor storage boxes waterproof?
Most resin boxes are water-resistant but not fully waterproof. They have seals that keep out rain in normal conditions, but prolonged exposure to standing water can lead to leaks.
Can I use an outdoor storage box as a bench?
Yes, many boxes are designed to support seating weight. Check the lid weight limit, which is typically between 80 kg and 150 kg for models under £300.
How do I assemble a resin storage box?
Most resin boxes use a snap-together or screw-together system. Assembly usually takes 15 to 45 minutes and requires no specialist tools. Follow the included instructions carefully.
What size storage box do I need for garden cushions?
A 250 to 300-litre box can comfortably store two large patio chair cushions or a full set of four standard cushions. Measure your cushions before purchasing.
Will a plastic storage box fade in the sun?
Quality boxes include UV stabilisers to resist fading. Cheaper boxes may fade over time. Brands like Keter and Suncast offer good UV protection in their resin products.
Can I lock an outdoor storage box?
Many boxes have a hasp or loop for a padlock. Some include a built-in lock. Always check the product specifications if security is a priority.
How long does a resin storage box last?
With proper care, a quality resin box can last 5 to 10 years. UV exposure and extreme temperatures can shorten its lifespan. Wooden boxes can last longer with annual treatment.
Is it better to buy a wooden or plastic storage box?
Plastic boxes are lighter, maintenance-free, and easier to assemble. Wooden boxes offer a natural look and higher weight capacity but require regular treatment and are heavier.
Can I store a lawnmower in an outdoor storage box?
Yes, but you need a box with a large capacity (300 litres or more) and a wide opening. Check the internal dimensions to ensure your mower fits through the opening.
What is the best outdoor storage box for small gardens?
The Suncast 235L deck box is compact and lightweight, making it ideal for small spaces. The Keter Store-It-Out is also a good choice with a moderate footprint.
Our verdict
For most buyers, the Keter Store-It-Out is the best outdoor storage box under £300, offering the best combination of capacity, weather resistance, and user-friendly features. If you are on a tight budget, the Suncast 235L deck box provides reliable storage at a lower price. For maximum durability, choose the Lifetime 60024, and for a natural look, the Forest Garden wooden box is unmatched.