Making a simple house in Blender takes ages, and I can't be bothered.
Instead, here's a script to make them automatically.
The point is that you can create it here, export it as .ply,
and then reimport it into blender and do what you want with it.
There's no suggestion that the house is amazing --- but if you
want a quick house in a 3d project ... try this.
You can view the house by clicking below.
Instructions: Mouse steers, 'w','a','s','d','q','z' move you.
In that past, I've had criticism that it's difficult to navigate. I'll fix that one day.