I've come across a few ladybirds this autumn although they didn't seem that obvious during the summer.
I'm finding quite a few in the curled up leaves of various plants - getting ready to overwinter. Years ago, people use to "tidy" their garden in Autumn and unknowingly probably destroyed lots of our beneficial insects. Hopefully we are better educated these days. If I really need to clear some vegetation, I "re house" ladybirds somewhere else.
As to Ladybird houses, those I have seen advertised are terribly expensive. I have kept back some decent logs, drilled holes and hung them in trees/shrubs. At least one Bumblebee seems to be happy in there and one or two of my Ladybirds. It is a start but if anyone has more advice, I'd be glad to hear as well.