How old are you, Aprilrose? and when were your grandparents born?
My four grandparents were born between 1884 and 1891. In my late teens I stayed with one pair for several months one summer in 1958. They lived in a rented flat with the bathroom on the floor below - just a bath and toilet, no basin. To have a bath you had to put money in the gas meter, light the geyser over the bath, and wait for the water to heat up. Granny asked me to keep the bathwater, so she could use it after me. I didn't have many baths. Normal washing was at the kitchen sink, with a kettleful of hot water. They had electricity, but mostly for lighting, only one powerpoint in the kitchen.
The other grandparents had started off in worse conditions, but had been moved in the 1920s from a slum clearance area into - heaven! - a newly built council house with inside toilet, separate bathroom, again with no basin just a bath and a copper, their own kitchen, and no less than three bedrooms. Before that they shared a house with relatives, having their set times to use the kitchen, one (cold) tap at the kitchen sink, no electricity, no bathroom at all, a shared toilet at the end of the yard, reached by going through the kitchen and out the back door. The other husband was a sweep and stored piles of soot in the cellar to sell to gardeners after it had matured. That was also where the baby's pram was stored, unsurprisingly it was always black, and so was the baby. Over the wall at the end of the yard were the Co-op stables. For my mother as a child, visiting the toilet after dark meant meeting a few rats, after negotiating round the sweep dead drunk at the kitchen table.
I'd put council housing well at the top of the list of essentials.