LEGO House

This is a basic LEGO house design that my brother and I came up with. It opens up to reveal the rooms.

The outside.

My mini figure next to it for scale.

The inside:

 There are two rooms. Bedroom and living room.

 The living room features a chair, lamp and a table which holds a phone and mug.

 The bedroom has of course, a bed. There's a stand for the owner's Scout Ship. And, a poster with the space shuttle launch pad from one of my Dad's old Lego sets.

Action shot of the house closing.

 These hinged blocks are what allow it to open. One at the top and bottom keep it from breaking in half.

The idea to build a house that opens was from a cottage that could split in half featured in my brother's LEGO Play Book.
 To build this, we used four 6x10 plates (Two for floor, two for ceiling) and two hinged pieces. (2 1x2 bricks that attach.) It's important to remember to make sure the hinged pieces are facing the right way so it will open properly. Exactly how you build it is up to you! Add as many windows and things as you'd like. You could build a slanted roof. I built a version of this that had four rooms rather than two. Experiment however you want, this is a versatile build.
We made all the bricks blue for ours. You could have a yellow house, a white house, a multi colored house or even use different shades of red to make it look like bricks. You could add a stripe of a different color, it's all up to you!
Now your mini figures have a place to live. Furnish it accordingly. I might post some furnishing tutorials and pictures soon if you need ideas.