We have just gained planning permission to construct what will be our retirement home on land adjacent to our existing house. During the build of our new home we are looking to purchase a caravan / mobile home to live in for the duration of the build. I believe we will be able to get a new electrical and water supply that can be used by the caravan but we will not (in the caravan) be able to connect to the mains sewer. We have no prior knowledge or experience of caravans, apologies if this has been discussed before (I can’t find it) but how do caravans / mobile homes dispose of everything from dishwater to raw sewage when ‘off grid’?