Many many moons ago, my great aunt and uncle built a house in what was then a small Highland village but is now a dead posh holiday retreat. Great Aunty had this apparently appalling tomcat (they didn't neuter up there in those days) who sprayed on every surface known to man. She loved him dearly and Great Uncle said she could keep him only if he lived outside - so they built 'the shed' for him. (The extension.)
I was up there recently and the house is all whitewashed and beautiful. Ditto the shed.
I don't know whether I should write to the new owners letting them know. I hate to think of history dying - but maybe they wouldn't want to know about it?