Interior designers share 5 of the best and 3 of the worst ways to use extra space in your home

Designers said there are some smart ways — and riskier ways — to utilize extra space in a home. sl-f/Getty Images/iStockphoto Interior designers told Business Insider the best and worst ways to use extra space in your home.  Bookshelves can provide extra storage, TKTKTKTKT Sometimes a built-in storage unit or cabinet can lower the resale value of your space. Whether you rent an apartment or own a house, it's essential to consider how your design choices allow you to make the most efficient…