Many Victorian houses were built with little or no foundations. When I worked on sites in the late 70s and early 80s though we were still installing asbestos water tanks and flue pipes and I can remember carpenters sawing 8' x 4' sheets of asbestos to line integral garage roofs.Immediately post war houses are very good. Extremely solid, great space standards, generally big gardens. There are big swathes of 50s local authority housing that will stand for ever. The only issues are that they're a bit dark inside compared to 60s / 70s stuff and that people in the 50s sure did love their asbestos.
Most of the Victorian stuff I've seen round here seems to have been built from rubble by total cowboys. Then as now people built to a price.