The house works like a safe house, there is a lever inside that one turned on will lock the doors, cover the windows as well as block the roof.

When open light can come in from the roof, windows making it ideal for shops who want to lock up at night.

I have left it pretty simple so that if you want to change the walls to a different block type you can with out too much work.

The actual redstone is easy to understand once you take a look at it allowing you to make a large building if needed.