Google Maps – Move Work Location

You can report the error to Google from the marker on the map.

• After you search for a place, click the appropriate marker. The info window appears.
• Click Edit > Report a problem.
• Select the issue that pertains to this place and add any comments you have.
• Click Report a problem. Google will investigate the place you have reported.

Taken from this help article

UPDATE

It appears that you can't report it then. I've had a look around but there doesn't seem to be a simple "Report here" link.

This is from a help article that can be found here

If the Edit or Report a problem link is greyed out or doesn’t exist, this means that you’re not able to tell us about these issues just yet. Don’t worry, we’re working hard to make this available in all countries!

One way is to click the little circle above the Street View man's head. This forces it to detect your location, and Maps will ask you for permission to share your location. Assuming you accept, or have turned on auto-accept, it should then update your position to your new location.

The only time it seems to fail is when you're on a network that Google Maps can't recognize. But that seems fairly rare.