How much space will I need? A good starting point is often the number of bedrooms in your property. This provides a fairly accurate estimate of the storage space you will need. If you wish to store the contents of your loft or garden shed, list any large individual items and then add any additional boxes and discuss it with us. Let us know the number of boxes, or size of the office, warehouse or stockroom whose contents you need to store and we will work out the required storage space.