The short answer
A shed base in the UK typically costs roughly £100–£800 depending on the type and size. A plastic grid base is usually the lowest-priced at around £15–£55 per m²; a paving-slab base sits around £40–£80 per m²; and a poured concrete pad is the most durable but most expensive, with concrete itself commonly £100–£140 per m³ plus labour and hardcore. The right choice depends on the shed's size and weight, the ground, and how permanent you want it — a small timber shed sits happily on a grid or slabs, while a large or heavy building is better on concrete.
The base is the part of a shed job most worth getting right — a level, solid base keeps the timber off the ground and stops it twisting. The figures below are typical prices for guidance, not quotations.
Typical UK base prices
- Plastic grid£15–£55 / m²
- Paving slabs£40–£80 / m²
- Poured concrete£100–£140 / m³ + labour
- Whole base (typical)£100–£800
- Most durableconcrete
How the base types compare
A plastic grid base is the quickest and lowest-priced, laid on a bed of gravel to spread the load and drain well — ideal for small and medium timber sheds. Paving slabs give a firm, flat platform and are a popular middle option, costing more in materials and labour but lasting well. A poured concrete pad is the most permanent and the best for large, heavy or workshop-style buildings, but it costs the most and is harder to remove later. The bigger and heavier the shed, the more a solid base earns its place.
| Base type | Typical cost | Best for |
|---|---|---|
| Plastic grid | £15–£55 / m² | small & medium timber sheds |
| Paving slabs | £40–£80 / m² | most standard sheds |
| Poured concrete | £100–£140 / m³ + labour | large, heavy or workshop sheds |
Indicative UK figures for guidance. Concrete priced by volume; grid and slabs by area. Sources: MyJobQuote and Material Calculator base guides.
Why the base is worth getting right
A shed is only as sound as the base under it. An uneven or damp base lets the timber twist, the door bind and rot start at the floor — which is why skimping here often costs more later. For most gardens a grid or slab base is plenty; concrete is the choice when the shed is large, holds heavy equipment, or you want a permanent workshop. Whatever the type, the base should be level, well-drained and slightly larger than the shed footprint.
Want the base specified properly?
We'll match you with a vetted shed or garden-building installer who assesses your ground and quotes the right base — grid, slabs or concrete — for the shed you want.
Frequently asked questions
How much does a shed base cost in the UK?
Typically £100–£800 depending on type and size. Plastic grid is the lowest-priced at around £15–£55 per m², paving slabs around £40–£80 per m², and a poured concrete pad the most expensive but most durable, with concrete commonly £100–£140 per m³ plus labour.
What is the lowest-priced shed base?
A plastic grid base laid on gravel is usually the lowest-priced and quickest, and works well for small and medium timber sheds. Paving slabs are a firm middle option, while concrete is the most durable but most expensive.
Do I really need a base for a shed?
Yes — a level, solid, well-drained base keeps the timber off the ground and stops it twisting, the door binding and rot starting at the floor. The base type can vary, but a proper base is not the part to skip.
Sources & further reading
Figures on this page are typical UK ranges drawn from published sources and depend on your specific garden and shed. They are guidance, not a quotation.