25. A Mini Bar
Constructing an underground bar is one of the most common basement renovations for adults. This thing will automatically become one of your friends and family's most famous places to hang out. According to Angie's List, it costs from $2,000 to $4,000 to create a basement bar area.
Naturally, if you fill the bar with expensive drinks, it will cost much more. You can also buy a beer faucet to use at home so that you drink your favorite brews on tap if you want the bar to feel very authentic.
