If you’re thinking of upgrading your garden setup or diving into year-round growing, a polycarbonate greenhouse could be just the thing. But before you take the plunge, let’s talk about the cost of a polycarbonate greenhouse because knowing what to expect upfront helps you plan better and buy smarter.
From compact starter models to full-size walk-in greenhouses, polycarbonate designs vary widely in price. In this guide, we’ll break down the average polycarbonate greenhouse cost, explain what affects the price, and help you find the best value for your budget.
How Much Does a Polycarbonate Greenhouse Cost in the UK?
On average, you can expect the following price ranges for polycarbonate greenhouses in the UK:
-
Small (6ft x 4ft): £200 – £400
-
Medium (6ft x 8ft / 8ft x 10ft): £400 – £800
-
Large : £800 – £1,500+
These prices vary depending on build quality, glazing thickness, and frame type.
At Gradwell Group, we offer competitively priced greenhouses using twin-wall polycarbonate and rust-free aluminium frames, perfect for British gardens.
What Affects the Cost of a Polycarbonate Greenhouse?
1. Size
It’s simple: the bigger the greenhouse, the more you’ll pay.
Tip: Don’t just consider what fits your garden, think about how many plants you’ll realistically grow.
2. Glazing Thickness
Twin-wall polycarbonate is the standard and provides good insulation.
-
4mm twin-wall: Affordable and effective
-
6mm or thicker: More durable and retains heat better
3. Frame Material
Frames come in various materials:
-
Aluminium (best value) strong, rustproof, and low-maintenance
-
Steel or wood usually more expensive and heavier to install
4. Added Features
Extras like automatic vents, base kits, rainwater systems or sliding doors can bump up the price.
But they’re often worth it for comfort, performance, and durability.
Is a Polycarbonate Greenhouse Worth the Cost?
Absolutely. Unlike traditional glass, polycarbonate is:
-
200x more impact-resistant
-
Lighter and easier to install
-
Naturally insulating, reducing energy bills
-
UV-protected so it won’t yellow or crack
Fun fact: According to Clear Amber Shop, twin-wall polycarbonate can reduce greenhouse heat loss by up to 40%, making it more energy-efficient than single-glazed glass.
Gradwell Group Building Products: Great Greenhouses, Even Better Prices
We specialise in high-quality, weather-resistant greenhouses that work for every type of grower from beginners to seasoned allotment pros.
Our bestsellers include:
-
6ft x 4ft Twin-Wall Aluminium Greenhouse – from £289
-
8ft x 6ft Large Frame Model – from £449
-
Lean-to Polycarbonate Greenhouses – from £592
Top Tips for Saving Money
-
Buy in off-peak season (autumn/winter) prices are often lower.
-
Look for bundles; some kits include bases or auto vents.
-
Go DIY most of our models come with clear instructions for self-assembly.
-
Measure twice, buy once avoid spending on extensions later.
FAQs
1. Is a polycarbonate greenhouse cheaper than glass?
Yes. Polycarbonate is not only cheaper to buy but also easier to transport and install.
2. How long will a polycarbonate greenhouse last?
With proper care, expect 10 to 15 years thanks to UV-stabilised panels and rust-free frames.
3. Are polycarbonate greenhouses good for winter growing?
Yes! Their insulating properties help maintain heat and extend the growing season.
4. Do I need planning permission in the UK?
Most garden greenhouses don’t need permission, as long as they’re under 2.5m high.
For official guidance, visit the Planning Portal.
5. Can I build it myself?
Yes. Our greenhouses are designed for easy DIY installation. Or we can help you find a pro.
Final Thoughts
A polycarbonate greenhouse is more than just a garden accessory; it's an investment in better crops, longer seasons, and easier gardening. And with prices starting from just £200, you don’t need to spend a fortune to get started.
At Gradwell Group, we combine quality materials, affordable pricing, and trusted UK service. Whatever your space or budget, we’ve got a greenhouse that fits.
Browse our Polycarbonate Greenhouses now
Have questions? Contact us here