Hi CutePInCushion
It should be ok on your patio. Ideally it’s good if there is a bit of cover fairly nearby. But, for instance I keep my feed boxes on my patio and the hog has chosen to use one of them to nest in – and similar has happened before. They need lots of material nearby but will collect it from a nearby border. They do tend to use a bit of green material as well, which they ‘pick’ for themselves.
Don’t worry too much if you don’t have suitable space for more hog houses, the hogs visit several gardens – they can travel up to 2 miles in a night, so there may be other suitable nesting places in the other gardens they visit.
By the way, Kitty878 – it’s only some hogs who like sticking to the outside of the garden. It’s always made me laugh that most of the hogs here mostly use the path! Always have – and that includes ones who didn’t like going into boxes, so real wild hogs.
