eyesore
ˈʌɪsɔː
noun
a thing that is very ugly, especially a building.
the office crumbled into an eyesore
ugly sight,blot (on the landscape),mess,scar,blight,disfigurement,blemish,defacement,defect,monstrosity,horror,carbuncle,excrescence,atrocity,disgrace,ugliness,sight,fright