If your home no longer fits your needs, you might be thinking of building an addition. A new wing, great room, or even bedroom can make your current house feel more like your home. You may also consider an addition if you find an awesome home for sale that's simply lacking in a few ways. We've seen plenty of Belleville homes for sale with additions that blend in well with the original architecture. Here are some key things to know if you're thinking about having an addition built.