When are we talking about? Because Sears Roebuck started shipping house kits in 1908. Are you thinking 1800s??
The reason you had those kinds of homes in Victorian era is BECAUSE you didn’t have mass production. It was inefficient and most people didn’t live in those kinds of residences. What you are thinking of is a romanticized version from movies. Most people lived in dirty cheap shanties and wooden boxes. Mass production actually enabled the average person to afford a quality home. It IMPROVED standards and elevated quality of life.