There was a vacant lot by my kid's school that they recently started improving; put a fence around it, put a foundation in, etc. Assumed they were gonna build a house there.
Turns out the house was already built! They closed the road today and brought in a giant crane, trucked the house in in two pieces and plopped it on the foundation.
The house was actually built by students at the high school, as part of a geometry class(!), and will be sold at an affordable price to someone not making more than 120% of the median neighborhood income.