The hexagon house was specifically designed to sit on a slope or a ridge line, meaning it is perfectly suited to the terrain of Tipsico.
I also bought up a good chunk of the ridge line in an attempt to de-flatten the sim, lots of which got leveled into 512 flat plot. Leads to a very strange geography along the ridge, where the old slope was close to 45 degrees.
No, the big thing next to it is not on my property. It is a house belonging to an old timer that was very well done for its time. Though there is a little pixel panic.