Have you ever wondered if you’re paying too much for rent? Enter Rentometer. Simply type in your address and a few details about your apartment, and the site will display a map of similar units in the neighborhood and what they rent for. Clicking on any of the pushpins representing them will display a balloon with details. It also does a nice job of calculating the median rent for the area, and displays a graph showing the lowest to highest rent, the median and where you fall in the range.

This tool is yet another mashup of Google Maps combined with data from the iiProperty (Investment Instruments, Corp.) property management company.

The service would also come in handy while apartment hunting.

And finally, if you’re curious where the rents are highest in the States, they even have a Top 10 list. Not surprisingly, New York (Manhattan) gets top billing, and the rest of the list is all California.