（巨無霸）豪宅（a large, opulent house, especially a new house that has a size and style that doesn't fit in with the surrounding houses）

Example Citation:

In a world of bloated S.U.V.'s and rambling McMansions, there are times when smaller is better.

-- Steven E. Brier, "Nikon's New Digital Camera Fits Easily in a Pocket," The New York Times, August 16, 2001