What do you mean incongrous doesnt sound right? Not suited to circumstances: improper, inappropriate, inapt, inept, malapropos, unapt, unbecoming, unbefitting, unfit, unseemly, unsuitable. >>>>> Idioms: out of place. See agree/disagree, usual/unusual.
As an adjective I agree, but I was looking for a noun, and the noun version "incongruousness" doesnt work as a substitute for an out of place building.
White Elephant A property that is too expensive to maintain or generates too little rent to pay for itself. Example: A proposed luxury hotel development in an area not served by air travel is likely to become a white elephant if developed.