LEGO building bricks are wonderful toys for opening a child's imagination. While LEGO offers many specialised parts for making vehicles with moving parts, sometimes the simplest ideas are the most satisfying. There are many ways to build a LEGO house.
An idea for a house can come from anywhere. The simplest idea will be to recreate a house you are familiar with: your own house, one you grew up in or one you visit frequently. But ideas can come from much further afield. Look in architecture magazines, in your neighbourhood and online. You can also check out LEGO communities online and see the houses that others have built themselves. Remember, if you want your house to be interactive with LEGO minifigures, it will have to have a removable roof or be missing one wall. Most LEGO models are built without a back wall, so LEGO figures can be placed inside.
It never hurts to start small. Build a cabin! Take a base plate and outline the frame of your cabin. Make it a rectangle, just big enough for one LEGO figure to live in. A reasonable size would be 10 studs on the sides and 20 studs on the front. This can be accomplished with two 8-stud blocks for the front wall (leaving a space for a door), and overlapping blocks of six and four studs and six and three studs on the sides. Always make sure to stagger the bricks in the corners for reinforcement, just as you would for a real log cabin. Once you get up to the second or third level, leave a gap for windows in both side walls. Optimum height for LEGO figures to fit is six or seven bricks tall. For simplicity, roof the cabin with flat plates (feel free to let them overhang a little bit) and top it off with angled bricks to form the slope. Interior furniture can usually be simply made out of a two-brick-and-one-plate bench for a bed, a chair and a table.
A Ranch House
Here's a simple house idea: A ranch house! Using a base plate, create an outline for the shape of the house you wish to build. Once this is complete, you can start stacking the bricks on top of it. Don't forget to leave gaps for windows and doors. Once the first level is done, build the interior of the house: beds, chairs, tables and any other furniture. It is usually advisable to keep these elements separate so you can continue to customise. Once the house is complete, you will need to assemble a roof for it. This can either be done with flat plates, a combination of flat plates and angled bricks, or with angled tiles and strip pieces if you want a more rustic look.
There are two techniques for building houses taller than one story. The simpler is to use the basic design of the cabin, above, and stack it taller. You can expand the idea as much as you like. While the building will only stay steady up to about three stories without reinforcement, you can put a plate on top of the cabin design and build another layer or two on top of it, duplicating it, without much difficulty. Now you have an apartment building! For the sake of realism, you can even build brick stairs up the side of the building.
The other concept for a two-story house is to take your basic ranch and put a second level on half of it. This will give a nice suburban look to your house. Remove the roof of the ranch house, and then place flat plates across the entire top of the house. Outline and build a room on the top according to the cabin design outlined above. Roof both of these sections, separately, and your split-level home is complete.