I now have building placement sorted and was able to randomly distribute 2 types of house along all roads facing the correct way. (Click the gif below for a first person tour of the streets)
I then tested it with larger buildings which went well, however the current system from which I was learning only works when all the wide buildings are placed at the centre and can’t be placed between normal width buildings. This isn’t too much of an issue however, as I wanted the important large buildings to be generally closer the centre of a town, and more residential areas further out from there. 
I am happy with the town generation, but it needs more decoration than just buildings to seem more natural and a more random element so it has more differences each generation. Also as I mentioned before I still need a wood texture as the neon colours of the buildings look like plastic rather than the children’s wooden block houses I wanted for my theme.