
1) American architectural style 2) Garage Mahal 3) Supersize house
Found on
https://www.crosswordclues.com/clue/mcmansion

In American suburban communities, McMansion is a pejorative for a type of large, new luxury house which is judged to be oversized for the parcel or incongruous and out-of-place for its neighborhood. Alternatively, a McMansion can be a large, new house in a subdivision of similarly large houses, which all seem mass-produced and lacking in distingui...
Found on
http://en.wikipedia.org/wiki/McMansion
No exact match found.