It’s easy to assume that a bigger house automatically means better design — more square footage, more luxury, more room to breathe. But walk through a few mega mansions, and you’ll start to notice ...

While most Americans are drowning in debt or struggling with rising housing costs, the world’s tech billionaires are living in luxury mega-mansions that would make the Gilded Age robber barons blush.

British music producer Alex Grant was living in an under-construction mega-mansion in Los Angeles when, one morning shortly after 9 a.m., an armed intruder burst into the home. “He came in and we had ...