Ouch! That is a tiny size for a bedroom! Very minimalist…
Growing up, our house had a large dining room that we used twice a year (Christmas and New Years) and a large living room that nobody ever used, as it had white furniture, white carpet and no TV.
All that space was wasted on some outdated idea of formal dinner parties.
When my parents built their retirement home they focused on comfort. They designed a large kitchen (because everyone gravitates towards the kitchen), a nice laundry room, and a large master bedroom and bath
I worked in the industry in the 1980s. There is an element of luxury - but sometimes it was just a matter of layout. The living spaces in these homes we dealt with was HUGE. There was a movement to separate out the master suite from the kid’s bedrooms. And no one wanted a ton of bedrooms - you weren’t going to have guests or six kids. So you’d have a master bedroom over a library, family room, den, dining room, kitchen - all enormous. And you don’t want a bedroom that can fit three king beds plus dressers, it looks silly. So they’d divide the space up - a small “master sitting room” (small ;)) and a large master bath - sometimes two - and huge closets. It kept the master bedroom space a reasonable size.
I also saw master bath/closet/workout room combinations - three “rooms” in an interconnected fashion. The space was designed to be used by a treadmill or an exercise bike or a weight system (sometimes all three) but if the owners weren’t really big on actually executing that idea, you ended up with these spacewasting rooms. (I was doing advertising work in the indusstry - we’d bring in an exercise bike to take photos).
I had my house built in 2003. When I saw how large the closet was in the master suite, I had mine build with power outlet and network connections and use it for my office. I also like having a kitchen big enough to eat in. The living/dining room is kind of wasted space except that I don’t have to bother taking down the Christmas tree.
Regarding closets, the trend appears to be towards building large walk-in closets, with spaces for all of one’s clothing, including drawers and shelves for things that don’t go on hangers. As a result, you don’t need dressers in the bedroom itself.
My bedroom is 8’ x 10’ (don’t share with the spouse for lots of reasons) and it is tiny. It was actually the bedroom I slept in when I was growing up (we bought the house from my parents). It wasn’t so tiny back then. 
I know a bunch of people that did that to their houses. My ex-BIL is a rather impulsive guy and when he became a firefighter a bunch of the other guys were carpenters and in helping them out he became a pretty good carpenter himself. I had heard him talking about helping two of his friends make their bathrooms into giant bathrooms bad hadn’t really given it any thought…then he bought his house.
It was a one story, one bathroom, two bedroom house. He knocked out the wall between the bathroom and the (non master) bedroom and made one ginourmous bathroom. You could easily fit a king sized bed in this bathroom. At the time I couldn’t understand it, I remember asking him why he would buy a teeny tiny house with two bedrooms and make it into a teeny tiny house with ONE bedroom. Then a few months later he (with the help of a few friends, added a second story. It’s actually a pretty nice house now. I still don’t see a reason to have a bathroom that size on the first floor other then because it’s neat. I think it’s just because it’s something unique, but I also think it’s going to make it a bit harder to sell the house when he’s ready to do that.
I’m not sure if he was planning to put on a second floor when he did the bathroom.
But yeah, I think it’s just for uniqueness. I understand the appeal of a big bathroom, but unless you’re going to have a giant shower or a jacuzzi, it’s just a lot of empty space that you can’t really do anything with.
With some of these homes, all I can imagine to round them out is an elevator that vomits blood over everything.
that is about the size of my old hundred+ year old house. the bathroom was shoehorned in, and the old outhouses in the wee back yards became bitsy shed/storage.
you could sit on the toilet, wash your feet in the tub, and scrub your face and hands in the sink, and open the door for the cat, without getting up.
That’s almost my current bathroom - except there’s not enough room for a tub, it has just a teeny shower stall.
my closet is bigger than the bedrooms of some people. it’s insane. my master bathroom is the size of a small bedroom.
I don’t know what the appeal is. i didn’t pick the house…my husband says it’s nice to have space…whatever that means.
i will admit, the huge closet is sooo nice…i have furniture in there and i like reading in there bc it’s quiet.
but the gigantic bathroom, i don’t understand that. i like SMALL bathrooms bc they hold the heat in the wintertime. having a huge bathroom makes wintertime morning showers miserable!
This made me snort and giggle.
I don’t mind large bathrooms if they have, you know, stuff in them. I once was in a large bathroom that had nothing but a standing shower, a toilet, and a sink. So you walked in, and the sink was on your right side. Then waaaaaaaaay over there, about ten feet away (!) was the toilet. Then all the way on the other side, the shower. So you had to walk back and forth to do anything.
There was an ad on tv a few years ago… the father is saying to the kid as he’s heading off to college for the first time… “You’re mother would be down here to say goodbye to but she’s all choked up.” After the kid leaves, he goes back upstairs and the mother is there with a tape measure saying “If we knock out this bedroom wall, the hot tub would fit right there…”
My first house was a bungalow built in 1962; paid $50K for it, the “master” was 10x12 and the other two were 10x10 and 8x10. My curent house has 3 bathrooms, a separate shower, big tub and walk-in closet. The master bedroom is 14x14. Why should I put up with tiny if I can afford not to. I’m tired of barely having enough room between the queen bed and the wall, I can fit a king bed easily.
The thing is, all this is much cheaper than it used to be, so why shouldn’t people indulge. Until when, about the mid-90’s, 35 inches was as big as TV got and 26 inches was typical? Today that’s ludicrously small for your main TV. Same with everything else… If it weren’t for gas prices, we’d all be driving International Harvester SUV’s. 
I have a friend that has a dumbwaiter from his garage to his kitchen in his beachhouse. I asked why he didn’t get a one person elevator installed, but apparently they are quite expensive.
Not to mention, you won’t get nearly as many laughs stuffing someone into an elevator as when you stuff him into a dumbwaiter.
These are important details when planning a house :).
Especially if that large bathroom has an outside wall (or two!).
At our townhouse, it was on the back wall of the house, and our townhouse was set back a couple of feet from the neighboring one. Which meant the entire back wall was exposed, and a bit of the side wall.
And the shower pipes were on that back wall, so they froze a couple of times (no disasters fortunately).
We kept a small “cube” heater in the bathroom there (not near any water supplies!!).
At the new place, that big ol’ bathroom is on a corner. Two windows on each side.
Needless to say, we still use that heater in the winter. At least the shower pipes are on an inside wall there (though our son’s room is on the other side of the wall, I expect he doesn’t appreciate it nearly as much!!)
Elevators are very pricey. I was once offered a job, and the best part was the three story cathedral ceiling of my office. The office was small, but three stories high. It was an elevator shaft in the original blueprints. The elevator was scraped for cost reasons, but the shaft remained.
I didn’t take the job, but had I the office woulda been 75% why.
You know most people don’t want to get the shaft.
I can dig it.
The biggest detail that got forgotten was that the architect designed the house too big to fit on the lot with the standoffs required by the city. You really think that would be on most architects checklists.