In the United States at least, large cheaply built houses are commonly termed “McMansions”. The term appears to be a portmantle of “mansion” (a large house) and “McDonalds”, the fast food franchise.
Many of these McMansions are built to look castle-like with (fake) stonework, quoins and in some rare cases, battlements. I have not seen a moat yet.
Anyway, my comment to these styles is, “that’s stupid”. The construction of these houses isn’t enough to stop a normal burglar or home invader, much less a siege engine. If you’re into paranoia about your house, look into survivalist architecture. If that isn’t yet a thing, I expect it to be made one to fill the perceived need.
I wonder if @legallysociable has any thoughts on this?