About Hedgehog House
The term 'hedgehog house' usually refers to an artificial habitat created by humans to support a local wild hedgehog population. They can be used to offer a suitable nest for hibernation or the rearing of young, or as a hedgehog feeding station.
Hedgehogs ideally like to nest on deciduous leaves under a canopy of brambles in a quite shady spot. Unfortunately such areas are often cleared away in public urban areas, even parks, so you can sometimes attract a population by creating a suitable wild spot in your garden. If you're not keen on cultivating brambles, an igloo-shaped wicker basket is a very easy way to create the right sort of space in a patch of long grass under a tree, or in the shade of a hedge.
If you're particularly keen to attract hedgehogs to your garden, it helps to improve on nature. Other designs may build on this natural-looking shape to provide a nest which is also warm and waterproof. A well-camouflaged habitat is more vulnerable to being accidentally trodden on, so it's worth considering something with a sturdy metal supporting frame.
The natural look may be of more interest to the householder than the hedgehogs, who will be happy in anything warm, dry, non-toxic and offering vital protection from predators while they sleep, nest or feed, so many excellent hedgehog houses look more like tiny wooden chalets. The most important feature to look out for is an access tunnel or dividing wall to prevent potential predators like badgers or foxes (or indeed the dog) from reaching in with paws, and there are many clever designs available in a range of materials.
Make sure there's a viable hedgehog route in and out of your garden.