The foundation is the most important part of your outdoor storage shed, but it doesn't have to be backbreaking work. It's possible that you might just need to dig a few holes in the ground, depending on the size of your shed and what you'll be using it for. Check your local building codes before you start. You may need a permit to build, and if you do, you may need a specific foundation as dictated by law.
Keep in mind that the foundation will need to support the weight of the shed, whether it's a wooden storage shed, a metal garden shed, or a plastic decorative shed. It will also need to protect the shed from ground moisture so that in the rainy Spring months your shed doesn't get water damage that can ruin the foundation years before the rest of it needs replacing.
The concrete slab is the most expensive and labor intensive, but can also be the most durable. The cost can be offset by the fact that the foundation can double as the shed floor with no further floor construction needed.
The concrete pier foundation is built on several single piers or columns, rather than one large concrete slab. The area underneath the shed is open air. This foundation can be completed in little time, and is much less expensive than the concrete slab.
Many manufacturers promote the use of a treated wood foundation. These are lighter than concrete, and may be placed directly on gravel beds, removing the need for concrete work. The wood used is treated to deter pests such as termites, as well as resist moisture rot.
You'll have to put some thought into which type of foundation to use - concrete, pier, or wood - for your outdoor storage shed, but with this information, it should make your decision a little easier!
Learn more about building a shed. Stop by Allen Hilton's site where you can find shed kits to take you step-by-step through the shed building process.