One building, two owners, two homes. I feel like this was Photoshopped. Someone cleverly merging two photos of different houses. (I must spend too much time behind the computer.).
But no it’s real. I browsed Google Street View and checked the earliest view available (2008). It looked like it was a two tone job, evern back then.
Duplexes are like that. Each owner able to exercise her dominion over her side. What do you do when you neighbor has completely different taste and style? Don’t dwell on it, try not to look at it and use the side door so you don’t have to see it. After a few years you won’t notice.