In my area of the UK at least, the house layouts of houses built last year aren't appreciably different from those built 200 years ago. That's specifically comparing detached and semi-detached houses. Terraces are a bit different now.

> then use wood and plasterboard for room walls and floor

One of the things I LIKE about older houses is that the interior walls are more solid than plasterboard. There is zero plasterboard in my house and brick gives far better noise insulation than anything timber framed.