Well... The story I mentioned above is from two or three years ago, so I have some further info, but nothing rising to the level of "Wow, unusual!" More "huh. Okay..."
My friend is very neighborly, and interacts with several households on our street, looks in on and takes food/helps a couple of older neighbors (our neighborhood was built in the 50's - there are still a few original or long time residents, along with younger families). So, in his usual way, he had introduced himself to new next-door-owner, when she, a single woman, was walking the property after closing. This was when he learned that she was planning renovations, and her mother would periodically be around overseeing things. He later described new owner ("NO") to me as a nice woman, in her 30's, who seemed excited about her first home purchase. My friend is a guy in his 40's who is now a newlywed, at the time his partner was living with him, which I would be willing to bet he mentioned in his introduction to NO, something like "hi, I am your neighbor, my name is GreatGuy ("GG") and I live next door with GreatPartner" - but I wasn't there, so can't say for sure.
Anywho, there proceeds to be a steady stream of contractors, materials, etc for the renovation at NO's house, which is not unusual around here as pretty much all houses have been remodeled or renovated at some point given the age of the neighborhood. GG works long hours, so doesn't see much during the week, but he gardens a lot and so would often be in his front yard while weekend work was going on at NO's. GG would sometimes chat with the contractors, not least since he was planning some remodeling of his own home, and sought references - plus he would occasionally see NO and speak with her, though he studiously avoided her mother after their one exchange.
At some point, NO tells GG she will be renting out the house after renovating, not unheard of in the area as a few houses have been or are now rented out by owners. He thinks this was a change in her plans, but doesn't want to pry by asking. Though he then notices the renovations proceed to be a little surprising for a rental: former owner had refinished and lightly altered the kitchen not long before selling (GG had been through the house often, he knew former owner - I had toured it while it was on the market) including granite counters, stainless steel appliances, upscale tile floor, etc. NO is not changing the footprint of the kitchen, nor changing the cabinets, but is replacing granite counters with granite counters, tile with tile etc - things which are not inexpensive to change, but you know - we all have our preferences, so if you're going to live with it, get what you want. It was a little surprising that someone would change one set of neutral but expensive finishes/appliances for different neutral and expensive finishes/appliances for a planned rental - but, not GG's business, so he noticed as NO pointed this out to him and complimented her choices, end of story.
Until he noticed a "stop work" order posted. NO's renovations also included adding a laundry room to the back of a carport - the laundry area was previously in a kitchen closet). New laundry room had been largely or fully built out, but was not in compliance with code - something about the venting/lines for the laundry being too close to the property line, so not a construction problem - but an insurmountable problem with the location, you can't put laundry room infrastructure *there*.
NO's solution was not to revert to prior laundry area which was still a closet in kitchen, but to tear out a bathroom, put the laundry area there, and ... Move the half bath (toilet and sink) to the new room at back of the carport, where you have to walk outside the house to use it. I would say that is unusual, particularly for a rental, and especially for a house which now has a single bathroom inside (it's the smallest model of the original homes built in our neighborhood).
I think the renovations went on for around a year, it was a lengthy period - so time from purchase to actual tenant in residence was pretty long, and renovation choices and planning which could be observed were unusual for a rental. GG thinks it may have been a case of someone wanting to own real estate, not knowing what they were getting into, etc. He has briefly met the tenants, says they are nice - he has not offered to mow the yard again, regardless.