A lot of people take part in building a house. An architect has to design the structure, a builder does the construction, a plumber hooks up pipes for hot and cold water, and an electrician makes sure the house is connected to electricity and that there are plug sockets for computers, televisions, lamps, refrigerators and more. Most houses have a lot of different rooms - a living room where the sofa and television are, a kitchen where the oven and fridge are, a bathroom where the toilet and shower are, and bedrooms where everyone sleeps at night. Some houses have more rooms than that, especially if they are big houses - there might be a special room for playing games in, or even a room with a swimming pool.