Various suppliers of wildlife accessories offer to sell different types of nest boxes for hedgehogs. They can't do any harm and they do draw attention to the fact that hedgehogs need somewhere safe to nest, especially in winter. However, some designs are rather expensive and perhaps needlessly elaborate. They range from a simple tunnel made of plastic sheet that can be thrust under existing vegetation, to boxes and tubs made from quality materials. Some garden wildlife books even suggest designs that have a ventilation chimney and built-in flea trap. Some garden centres sell nest boxes that cost about £ 40.00, have smart hinges and look very nice; all they lack is a note put out for the milkman! Actually, what the hedgehogs need is leaves or newspaper underneath some supporting structure like a pile of brushwood or a garden shed. Anything more elaborate is no more likely to be used. A paving stone raised on bricks at each corner will provide enough shelter and support, and you can stand a potted plant on top as well. Nests should be inspected with caution (or left alone) during the summer months as females with very young babies are liable to eat them or desert theri family if they are disturbed. Hedgehogs hibernating there during the winters seem like they are dead, but if you tickle the spines gently, they will stiffen as the animal bristles. If the spines stay slack, smell your fingertips. Dead hedgehogs pong!
Taken from The New Hedgehog Book by Pat Morris