If your retaining wall exceeds a certain height limit, you'll likely need to secure a permit before you start building. However, the rules can vary by location.

There are plenty of reasons to build a retaining wall. Those seeking a little extra privacy from prying neighborly eyes can benefit from one, as can gardeners who are tired of tearing their hair out ...

Add Yahoo as a preferred source to see more of our stories on Google. After watching the land wash away, you've realized it's finally time to add a charming retaining wall to your sloped backyard.