This is a Steatoda species, most probably Steatoda grossa, AKA cupboard spider. It is one of the false widow species, but as you note, they are timid, preferring quiet, dark places. It is more widespread than the more infamous noble false widow (S. nobilis), but adult females are perhaps less often seen. It's reclusive behaviour means that it is unlikely to be a problem (neither, for that matter are S. nobilis the vast majority of the time).
It's more usual to see wandering spiderlings & males, with more distinct white markings on their smaller abdomens.
I found one in my laundry basket at the weekend. I prefer to move them out of the bedroom/bathroom, others may prefer to remove them from the house altogether, but I'm happy to leave them be in other rooms.