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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

4m x 3m Aluminium Polycarbonate Hardtop Gazebo, Black

Original price £935.99
Original price £935.99 - Original price £935.99
Original price £935.99
Current price £767.99
£767.99 - £767.99
Current price £767.99
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, sheltered — whatever the British weather brings.

A polycarbonate hardtop gazebo changes how you use your garden — not just in summer, but across the seasons. Beneath the panelled black roof, there's genuine shelter: the kind that lets you stay outside when the sky turns grey.

Draw the grey curtains for privacy on a still evening, or tie them back and let the garden breathe. The structure holds its presence without dominating the space around it.

At 12m², there's room for a dining set, a sofa, or both — and the eaves sit high enough at 195cm that it never feels enclosed.

The roof is constructed from 6mm polycarbonate panels with a raised ventilation tier at the crown — visible in the profile of the structure. This upper tier allows warm air to escape and reduces heat build-up underneath, which matters on warmer UK days.

Integrated drainage channels run along the roof edges, directing rainwater away from the frame and off the structure cleanly — no pooling, no dripping through joints.

The powder-coated aluminium frame is lightweight relative to its footprint but rated to handle wind speeds of up to 31mph (Beaufort Scale 5–6). The snow load rating is 20kg/m², which covers typical UK snowfall — but the manufacturer advises clearing snow promptly and avoiding use during active bad weather.

Assembly requires 2–4 people and takes approximately 3–4 hours. No planning permission is required under permitted development rights, though it's always worth checking with your local council if your property has restrictions.

Key Features

🌧️
All-Weather Shelter
The 6mm polycarbonate hardtop keeps you dry in rain and shaded in sun, so your garden stays usable year-round — not just on clear days.
💨
Wind-Rated Frame
The powder-coated aluminium frame is rated to Beaufort Scale 5–6 (up to 31mph), giving you confidence the structure holds firm in typical UK conditions.
🌨️
Snow Load Rated
Rated to 20kg/m², this gazebo is built to handle the weight of UK snowfall — clear snow promptly and avoid use during active snowfall for best results.
🪟
Privacy Curtains Included
Four grey curtains are included and can be drawn for shade and privacy or tied back to keep the space open — no extra purchase required.
🦟
Mosquito Nets Included
Four mosquito nets are included so you can enjoy warm evenings outside without insects — simply hang in place of or alongside the curtains.
🔩
Fits Any Surface
Comes with both ground stakes for lawns and expansion screws for hard surfaces, so it can be anchored securely to patios, decking, or grass.

Specifications

BrandOutsunny
TypePolycarbonate Hardtop Gazebo
Frame ColourGrey
Roof ColourBlack
Curtain ColourGrey
Roof Material6mm Polycarbonate
Frame MaterialPowder-Coated Aluminium
Overall Dimensions400L x 300W x 292H cm
Eaves Height195cm
Column Spacing355L x 251W cm
Foot Size17L x 17W x 5H cm
Coverage12m² (suitable for 6–10 people)
Wind RatingBeaufort Scale 5–6 (up to 31mph / 49km/h)
Snow Load Rating20kg/m²
Product Weight75kg
Number of Boxes3
Assembly Time3–4 hours (2–4 people recommended)
Assembly RequiredYes
Warranty1 year (manufacturer defects only)

What's in the Box

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

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

No — this gazebo falls under permitted development rights in the UK, so planning permission is not typically required. That said, rules can vary depending on your property type or location, so it's always worth checking with your local council if you're unsure.

The frame and polycarbonate roof are designed for permanent installation and can remain in place through the seasons. However, the manufacturer advises against use during active bad weather — including heavy rain, snow, wind, and hail — and recommends clearing snow promptly to prevent excess load on the roof.

This gazebo is suitable for all surfaces. Ground stakes are included for installation on grass or soft ground, and expansion screws are included for hard surfaces such as concrete or paving. For wooden decking, specialist wood expansion screws are recommended to avoid splitting — these are not included and will need to be sourced separately.

Assembly takes approximately 3–4 hours and is recommended for 2–4 people. A full set of assembly instructions is included in the box. Having at least two people present is important for safely lifting and positioning the roof panels and frame sections.

Yes — four grey curtains and four mosquito nets are included with the gazebo. The curtains can be drawn for shade and privacy or tied back when not needed. The mosquito nets can be used alongside or in place of the curtains during warmer months.

The frame is rated to Beaufort Scale 5–6, which covers wind speeds of up to 31mph (49km/h) — typical of moderate UK conditions. The snow load rating is 20kg/m², which is sufficient for standard UK snowfall. The manufacturer recommends clearing snow promptly and not using the gazebo during active snowfall or severe weather.

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