What House?

One of the first things you'll need to decide is when you are thinking of moving. If you are looking to move in the immediate future, your focus will be on making aesthetic improvements to make your home more 'sellable'. Alternatively, if a move is a year or more away you could benefit from taking on a more significant project to add value to your home.
While you may think the idea of a housebuilder offering self-build plots sounds contradictory, the people who have struggled to get planning permission or finance for their own project might have appreciated a middle man to make life easier for them.