Apparently the world's current official narrowest house is narrower at the front (47 inches) but expands to 22 feet. This one will be a bit under 60 inches the

Apparently the world's current official narrowest house is narrower at the front (47 inches) but expands to 22 feet. This one will be a bit under 60 inches the whole way through. By average width, this will be the narrowest in the world, not just Warsaw.