I built this birdhouse (With a little help from somebody who knew what they were doing!) about a decade ago.
It seems to be used by some small birds… blue tits and chaffinches maybe? I often see them flying down from the branches of the tree then flapping outside the box. I don’t always see them go in but they seem to have used it as the wood around the entrance has been pecked/clawed away.
I have another birdhouse (Or is it a birdbox?) above my summerhouse (Effectively a shed) door but last year wasps occupied it!
Oh, and there is another one too, on the side of the summerhouse that does get some visits.