I’ve lived in a house like this and there are lots were I live. All originally council built properties. I never understood why the shared access was between the houses and garden (diagram 1) instead of at the bottom of the garden. (Diagram 2)
For me having small children and a dog it was a nuisance as I couldn’t ever leave my back door open for them to potter in the garden. It also meant people were walking right past my kitchen window as we were eating dinner.
Does anyone know why they were built this way?