This has been floating around the internet for some time.
The funny part is that heritage zoning is the reason the addition looks the way it does. The upper floor was inaccessible and stairs needed to be added. Local regulations state that any additions must be visually distinct from the original structure so this monstrosity was the result.
Look up Caldwell Tower in Scotland for more information.
Because though uPVC windows lack the myriad advantages of wood or stone frames, sometimes it is better for the ongoing fabric of a building to just get it weatherproof until someone comes along who can afford to put in more suitable replacements.
Then white uPVC frames are much cheaper than coloured versions.
I'm kinda with you. I hate that we've done this to what is basically a large historical artifact, but if this was all new construction... I could be into this.
People are such perfectionists when it comes to buildings. I love this image; the patchwork aesthetic needs less hate. Yeah it looks silly, but why should it look serious? I wouldn't be upset if a building built today were to have an awkward attachment added in 500 years that was built to the design standards of that time period.
Somebody showed me recently the rebuild of the Augusteum building of the University of Leipzig which had a hyper-modern redesign like 180 years after it was first built (look it up, it's pretty cool). And the building in this post is like a lower-effort, more earnest version of that idea. Is it bad real estate? Sure. But it's good architecture. "Authenticity" be damned.
Basically, do you want an abandoned ruin rotting away in a field, or do you want a building that people will continue to live in and take care of into the future?
Average looking house in Ukraine. Khrushchovka that itself doesn't look too good is ruined by the fact that each flat was renovated with 0 attention to how the other ones look. There are usually some white walls, some gray, some are still orange form the bricks, some balconies have windows, some don't.
Everyone laughing at the repairs to your tower until the Mongol hordes return - and theirs still aren’t done because they were waiting to source the right Welsh stone.
UK server, OK. Fine. But OP has never been to Pennsylvania in the US. Most houses over a hundred years old look like this: you can see the generations that have lived in it. First it's stone and mortar; then there's a wood addition ca. the early 1900s; then there's a more modern addition ca. the 50's or later. There's one property that was briefly famous as it came up in Zillow that had 5 clearly distinctive styles and technologies worth of additions on it; it's like every generation added another room with whatever was in style at the time. I can't find a picture, but it was hideous.
I don't know if it's common all along the mid-Atlantic, but it is super common in Pennsylvania.