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🚚 Free UK Delivery on All Orders | 60-Day Free Returns | Secure Checkout
🚚 Free UK Delivery on All Orders | 60-Day Free Returns | Secure Checkout

Aluminium 3m x 4m Polycarbonate Gazebo with Curtains by Outsunny

Original price £935.99
Original price £935.99 - Original price £935.99
Original price £935.99
Current price £743.99
£743.99 - £743.99
Current price £743.99
60-day returns | 1-year warranty | UK support
Availability:
in stock, ready to be shipped
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Free UK Delivery
1-Year Warranty
Easy Returns
Secure Checkout

Your garden, whatever the weather.

A polycarbonate hardtop gazebo that earns its place in a British garden — where the weather rarely asks permission. Whether it's a long Sunday lunch or an evening with friends, this structure gives you a proper outdoor room, not just a shelter.

The two-tier roof filters the afternoon light into something warm and diffused, casting a calm glow over the space beneath. Dark curtains drawn, netting down — it becomes a room of its own, quiet and unhurried.

At 12㎡, there's room for a full dining set and the kind of gathering that doesn't feel rushed. It's the sort of space you find yourself using far more than you expected.

The two-tier polycarbonate roof does the heavy lifting in British conditions. The upper vent tier draws warm air upward, keeping the space beneath comfortable even on close summer days. The 6mm polycarbonate panels block 99% of UV rays and shed light rain without pooling — and the structure is rated to carry an 80kg snow load, so it holds its own through a hard winter.

The powder-coated aluminium frame is reinforced with a steel support structure — visible in the branched column detailing — giving it the rigidity to handle a strong breeze up to 31mph (Beaufort 5–6) without flex or movement. The foot plates anchor to any surface: expansion screws for patios and hard standing, ground stakes for lawn. For timber decking, use specialist wood screws (not included) to avoid splitting.

The four curtains are water-resistant and tie back neatly when not in use. The mosquito nets attach and remove independently, so you can run netting without curtains on warm evenings. Both are included in the box.

No planning permission is required — this gazebo falls within permitted development rights for most UK properties. Assembly takes 3–4 hours with 2–4 people and full instructions are included. The product arrives in 3 boxes.

Key Features

🏗️
Steel-Reinforced Frame
Powder-coated aluminium reinforced with a steel support structure gives the gazebo the rigidity to withstand winds up to 31mph. The branched column design distributes load evenly across all four legs.
🌧️
All-Weather Roof
6mm polycarbonate panels block 99% of UV rays, shed rain without pooling, and carry an 80kg snow load — so the structure performs through every British season without compromise.
💨
Two-Tier Ventilation
The raised upper tier creates a natural chimney effect, drawing warm air upward and keeping the space beneath cool and comfortable on close summer days.
🪟
Curtains & Netting
Four water-resistant curtains tie back when not needed. Mosquito nets attach independently, so you can run netting alone on warm evenings without closing off the view.
📐
12㎡ Usable Space
At 4m x 3m with 195cm eaves height, there's comfortable room for a full dining set and 6–10 guests — enough space to feel like a proper outdoor room, not a temporary shelter.
Flexible Anchoring
Suits any surface — expansion screws for patios and hard standing, ground stakes for lawn. No planning permission required for most UK residential properties.

Specifications

BrandOutsunny
TypePolycarbonate Hardtop Gazebo
ColourBrown / Grey
Roof Material6mm Polycarbonate (blocks 99% UV)
Frame MaterialPowder-Coated Aluminium with Steel Reinforcement
Overall Dimensions400L x 300W x 292H cm
Eaves Height195cm
Column Spacing355L x 251W cm
Foot Size17L x 17W x 5H cm
Coverage12㎡ (suits 6–10 people)
Wind RatingBeaufort 5–6 (strong breeze, up to 31mph / 49km/h)
Snow Load80kg total
Product Weight75kg
Number of Boxes3
Assembly Time3–4 hours (2–4 people recommended)
Assembly RequiredYes
Warranty1 year — manufacturing defects only

What's in the Box

  • 1 x Hardtop Gazebo
  • 1 x Assembly Instructions
  • 8 x Ground Stakes
  • 8 x Expansion Screws
  • 4 x Curtains
  • 4 x Mosquito Nets

Why Buy From Opal Retail?

UK-Based Support

Our customer service team is based in the UK and available Monday to Friday. We're here to help before, during, and after your purchase.

1-Year Warranty

Every gazebo we sell comes with a minimum 1-year warranty. Buy with confidence knowing we stand behind the quality of everything we stock.

Free Returns

Not quite right? Return any item within 60 days for a full refund, no questions asked. We make the process as straightforward as possible.

Secure Payment

All transactions are encrypted and processed securely. We accept all major cards, PayPal, Klarna, Clearpay, and Shop Pay.

Frequently Asked Questions

Yes. The 6mm polycarbonate roof is rated to carry an 80kg snow load and the steel-reinforced aluminium frame is built to handle winds up to 31mph (Beaufort 5–6). The powder-coated finish resists corrosion, making it suitable for year-round installation in a British garden. In severe weather events beyond its rated limits, we recommend removing curtains and netting as a precaution.

No planning permission is required for most UK residential properties — this gazebo falls within permitted development rights. However, rules can vary for listed buildings, conservation areas, or properties that have already used their permitted development allowance. We recommend checking with your local council if you have any doubt.

Assembly typically takes 3–4 hours with 2–4 people. Full instructions are included in the box. The product arrives in 3 boxes, so we recommend having a clear, level space ready before you begin and checking all parts against the packing list before starting.

The curtains are water-resistant, meaning they will handle light rain and splashing without soaking through. They are not fully waterproof membranes — in heavy, sustained rainfall the polycarbonate roof provides the primary weather protection, with the curtains offering additional wind and privacy screening. We recommend bringing the curtains in or tying them back during prolonged heavy rain.

Yes. The mosquito nets attach and detach independently of the curtains, so you can run netting alone on warm evenings to keep insects out while keeping the view open. Both the curtains and nets are included in the box and can be mixed and matched to suit the conditions.

The gazebo comes with a 1-year manufacturer's warranty covering defects in materials and workmanship present at the time of purchase. The warranty does not cover damage caused by misuse, improper assembly, weather events beyond the product's rated limits, or general wear and tear. Assembly instructions should be followed carefully to ensure the warranty remains valid.

Delivery & Returns

Delivery

  • Free standard UK delivery on all orders
  • Estimated dispatch within 1-3 working days
  • Tracked delivery — you'll receive a tracking link by email
  • Mainland UK addresses only

Returns

  • 60-day hassle-free returns
  • Items must be unused and in original packaging
  • Contact our UK support team to arrange a return
  • Refunds processed within 5-7 working days