Before the invention of flushing toilets, the place where people were going to shit or piss was generally outside the house, also known as an "outhouse". A "domestic dwelling that contained a toilet and a kitchen" does sound unusual.
There are still old dry toilets in my grandparents old farm. Basically a cabin with a toilet seat made of wood on top of a big hole. Wood chips and saw dust was kept in a bucket for the user to cover his shit with.
Mixed with compost the end result was used as fertilizer.
In Australian slang this is called a 'long drop' after a particular style of judicial hanging.
And yes, there are spiders.