Greenhouse Cost Calculator
A typical 6x8 aluminium greenhouse costs £500–£1,500, the base it must have £300–£800, and assembly £150–£400 — so £950–£2,700 standing and glazed. Like sheds, the base is the part that decides how long the rest lasts.
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3 steps, using the figures from our cost guide.
How this calculator works
Every figure in this calculator is the one published in the cost table on our greenhouse guide. Pick the option that matches your job and the calculator returns that published range, adjusted for your region - it does not model anything the guide does not already say.
That is deliberate. A calculator whose rates drift from the page it sits under is worse than no calculator, because two numbers on the same site disagree.
What it cannot know: access, the condition of what is already there, and anything structural. Those are what separate three real quotes from each other.
Published greenhouse costs (2026)
| Option | Typical 2026 cost | Notes |
|---|---|---|
| Compact 6x4, built | £650–£1,300 | |
| Standard 6x8, built | £950–£2,700 | |
| Large 8x10 / 8x12, built | £1,800–£4,500 | |
| Slab or concrete base only | £300–£800 |
These are the figures from our greenhouse cost guide.
Greenhouse calculator — FAQs
A standard 6x8 aluminium greenhouse lands at £950–£2,700 including the base and assembly - the frame is £500–£1,500 of that, groundwork and building the rest.
Yes - level and square, in slabs or concrete, costing £300–£800. Frames anchored to earth twist out of square and start cracking their own glass.
Rarely - the same permitted development rules as sheds: single storey, height limits near boundaries, and no more than half the garden covered by outbuildings in total.
It is safer and insulates slightly better; it also yellows, scratches and blows out of frames in storms. Toughened glass is the durable middle ground for family gardens.
Related cost guides
- Greenhouse cost guide — The full price guide
- All gardening services — Browse the hub
- All BestBuilders services — Every trade we cover
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