Garden shed Cost Calculator
The shed is the cheap part. A typical 8x6 timber shed costs £400–£900, but based and built it lands at £1,200–£2,300 once a proper concrete base (£500–£1,500) and assembly (£100–£300) are counted. Skipping the base is how…
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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 garden shed 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 garden shed costs (2026)
| Option | Typical 2026 cost | Notes |
|---|---|---|
| 6x4 shed, timber base, built | £700–£1,300 | |
| 8x6 shed, concrete base, built | £1,200–£2,300 | |
| 10x8 shed / workshop, built | £2,000–£3,500 | |
| Concrete base only (~£100/m& | £500–£1,500 | |
| Timber / plastic-grid base | £50–£500 | |
| Assembly only (flat-pack) | £100–£300 |
These are the figures from our garden shed cost guide.
Garden shed calculator — FAQs
A typical 8x6 timber shed supplied, based and assembled lands at £1,200–£2,300 - roughly £400–£900 shed, £500–£1,500 concrete base, £100–£300 build.
Around £100 per square metre, so £500–£1,500 for common shed sizes including dig-out, sub-base and the slab. Timber and plastic-grid bases are cheaper and fine for smaller sheds.
Usually not - garden sheds are permitted development if single-storey, under 2.5m at the eaves when within 2m of a boundary, and outbuildings cover no more than half the garden. Listed buildings and some estates differ.
Yes, but outdoor circuits are notifiable under Part P of the Building Regulations - use a registered electrician. Budget £300–£900 for armoured cable, a small consumer unit and sockets or lighting.
Related cost guides
- Garden shed cost guide — The full price guide
- All gardening services — Browse the hub
- All BestBuilders services — Every trade we cover
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