We cannot stress enough the importance of putting your new County Garden building onto a solid, flat, level foundation. Get it right and your building will fit together perfectly and last for years. Get it wrong and you could have problems with assembly, the shed will not last nearly as long and the doors may not close properly.  We offer free advice on basework and offer a complete service if required. All subject to free site survey as required. We can usually find a satisfactory solution to a problem.

Key Points

You need a solid, flat, level base

You need sufficient room around the building for assembly and maintenance

You need to make sure you have suitable access for the panels to get to the base

Consider rainwater run-off

Floor plans are available for all of our standard models, which can sometimes help in constructing the base. Please specify on order if your base requires the direction of the floor joists to adhere to the floor plan as this can be subject to change

Suitable bases

The base itself needs to be completely level.

If paving slabs are required these must be suitably bedded, even and level. Likewise a concrete base if desired. Both must be properly laid… not just put straight onto soil or grass.

DECKING can be of use if it’s strong enough. A paving slab in each corner is not enough. The floor must be sufficiently supported throughout. Other examples of unsatisfactory bases include,, soil, grass, loose bricks, pallets or any other uneven surface.

- the base does not necessarily have to be any larger than floor of the shed. Paving slabs must be laid properly and not just put straight onto soil or grass.

A paving slab in each corner is not enough, even if they are level; the floor must be sufficiently supported throughout. Other examples of unsuitable bases include soil, grass, loose bricks, pallets, and any uneven surface.

Positioning of your building

Sizes listed are approximate and do not allow for roof overhang. It is normally best to allow plenty of room around the building - the minimum space required is usually 300mm (1ft) all the way around although 500mm is preferable.
This is important and can make assembly easier as well as future re-treating and maintenance.

Bear in mind the roofs do overhang the main body of the building so this must be taken into account, for example when a building is going into a more enclosed area.

We understand that not everyone is looking to locate their shed in a large open area. With advice from us usually a suitable solution can be found.


We can supply bearers with your building if you wish to further raise the floor off the ground.

Bearers can  be very useful in many situations to help stability and load spread across whole floor and we would always use Tanalised 3 x 2 bearers for longevity.

The bearers would run in the opposite direction to the floor joists of the shed - if you are supplying your own bearers or sleepers then please check which way they will run and then specify on order that they must adhere to the stated direction as it can be subject to change.*

Normally bearers are not essential if you have a solid, flat, level base (other than for the reason previously mentioned), as the floor is on floor joists, which allow air underneath and keep the floorboards off the base. If your base is gravel / shingle then you should sit the shed on bearers / sleepers to give it a solid foundation and support the floor evenly. The gravel / shingle still needs to be level and shouldn't be too loose.

* Extra charges apply for bearers, no guarantee will be given for bearers that we haven't supplied. If your supplying your own bearers it will be YOUR responsibility to ensure that the bearers are the correct ones - CGB accepts no liability for wrong bearers supplied by customer.