|A few builders did not provide
vents for dryers so owners need to use
more expensive vent-less dryers.
New tiny condo units may come with a rinky-dinky combination washer/dryer. Be careful with these front-load toys as they will leak if you overload them or put in too much soap.
Older condos may have swipe-card operated laundries on the ground floor and have rules against in-suite washing machines and dryers.
Many people don't like sharing washing machines but having the washers/dryers as common elements means that you don't have to worry so much about water leaks.