Shed Base Kits

A shed base kit gives you the whole foundation in one package — timber components sized and ready to assemble into a firm, level platform for your new building.

Compared with laying concrete, a kit is faster, cleaner and far easier to get right first time. There's no mixing, no curing time and no permanent alteration to the garden: assemble the frame, get it level, and the shed can go on top as soon as you're ready.

The kits in this collection are sized around popular shed footprints, so start from your shed's dimensions and pick the matching base. If your shed falls between sizes, choose the next size up rather than letting the floor overhang the frame.

14 products From £54 to £316
Everything you need to know

Choosing the right garden storage for your space

Garden storage has to do three things at once: keep your kit dry, stand up to British weather year after year, and actually look right next to your planting. Most cheap options get one of those — ours are designed around all three.

Use the filters to narrow by capacity, material, and feature. If you're not sure where to start, our 60-second storage finder will shortlist three options for your garden.

Common questions

Before you buy Shed Base Kits.

What is included in a shed base kit?

A shed base kit gives you the whole foundation in one package: timber components sized and ready to assemble into a firm, level platform for your new building. Everything needed to build the frame comes together, so there is no sourcing separate materials. You simply put the parts together following the sizing, level it, and it is ready for the shed.

How do you assemble a shed base kit?

Assembly is straightforward: put the timber frame together, then get it level on prepared ground. There is no mixing, no curing time and no permanent alteration to the garden. Because the components are pre-sized for the shed footprint, most of the work is simply fitting the parts and checking the platform sits flat before the shed goes on top.

Is a base kit better than laying concrete?

Compared with laying concrete, a kit is faster, cleaner and far easier to get right first time. There is no mixing or curing, and nothing permanent is added to the garden, so the base can be lifted or moved later. For most gardeners it removes the hardest part of installing a shed while still giving a firm, level foundation.

What size shed base kit do I need?

The kits are sized around popular shed footprints, so start from your shed's dimensions and pick the matching base. If your shed falls between sizes, choose the next size up rather than letting the floor overhang the frame. A slightly larger base is fine, but an undersized one leaves the shed floor unsupported at the edges.

Can the shed go on as soon as the kit is built?

Yes, and that is a key benefit over concrete. There is no curing time to wait out, so once the frame is assembled and levelled the shed can go straight on top whenever you are ready. This makes it possible to prepare the base and install the shed in the same session, weather permitting.