It’s unexceptional today to come across an open-plan apartment, because (except for the very rich) we don’t typically share our homes with servants, and we have efficient ventilation and climate control. Try to imagine living in an open-plan Victorian flat with a coal-burning kitchen range and fireplace puffing out smuts, a maid and a cook to keep on top of the grime and the food preparation: it doesn’t work. Try, also, to imagine a contemporary home without a living room with a TV in the corner. Go back to the 1950s and well-designed homes also had a niche for the telephone — the solitary, wired communications device, typically bolted to the wall in the hallway or at the foot of the stairs, for ease of access from all other rooms.

But today telephones have collapsed into our pocket magic mirrors, and TVs are going in two directions — flattening and expanding to fill entire walls of the living room, and simultaneously shrinking to mate with our phones. A not-uncommon aspect of modern luxury TV design is that they’re framed in wood or glass, made to look like a wall-hanging or a painting. The TV is becoming invisible: a visitor from the 1960s or 1970s might look around in bafflement for a while before realizing that the big print in middle of the living room wall is glowing and sometimes changes (when it’s in standby, running a screensaver). Meanwhile, microwave ovens and ready meals and fast food have reduced the need for the dining room and even the kitchen: to cook a family dinner and serve it in a formal dining room is an ostentatious display of temporal wealth, a signal that one has the leisure time (and the appliances, and the storage for ingredients) to practice and perfect the skills required. The middle classes still employ cooks: but we outsource them to timeshare facilities called restaurants. Similarly, without the daily battle to keep soot and dirt at bay, and equipped with tools like vacuum cleaners and detergents, the job of the housemaid has been shrunk to something that can be outsourced to a cleaning service or a couple of hours a day for the householder. So no more cramped servants’ bedrooms.

The very wealthy ostentatiously ape the behaviour of the even richer, who in turn continue the traditions they inherited from their ancestors: traditions rooted in the availability of cheap labour and the non-existence of labour-saving devices. Butlers, cooks, and live-in housemaids signal that one can afford the wage bill and the accommodations of the staff. But for those who can’t quite afford the servants, the watchword seems to be social insulation — like the dining room at the opposite end of the corridor from the kitchen.

The millionaire’s home cinema, in an auditorium of its own, is the middle class TV in the living room, bloated into an experience that insulates its owner from the necessity of rubbing shoulders with members of the public in the cinema. Likewise, the bedroom with en-suite bathroom insulates the occupants from the need to traipse down a corridor through their dwelling and possibly queue at the bathroom door in the middle of the night.

Types of domestic space come and go and sometimes change social and practical function.

The coal cellar is effectively dead in this era of decarbonization and clean energy, as is the chimney stack. Servants’ quarters are a fading memory to all but the 0.1% who focus on imitating the status-signaling behavior of royalty, although they may be repurposed as self-contained apartments for peripheral residents, granny flats or teenager basements. The dining room and the chef’s kitchen are becoming leisure pursuits — although, as humans are very attached to their eating habits, they may take far longer to fade or mutate than the telephone nook in the hallway or the out-house at the end of the back yard.

Likewise, outdoor climate change and indoor climate control are changing our relationship with the window. Windows used to be as large as possible, because daylight lighting was vastly superior to candlelight or oil-lamp. But windows as generally poor insulators, both of sound and heat, and indoor lighting has become vastly more energy efficient in recent years. Shrinking windows and improving insulation (while relying on designed-in ventilation and climate control) drive improvements in the energy efficiency of dwellings and seem to militate against the glass bay and big sash windows of yesteryear.

Charles Stross, “Social architecture and the house of tomorrow”, Charlie’s Diary, 2019-04-29.