Are meteorites found everywhere? I know we can find meteorites from space in Antarctica because snow is white, and we can find them easily on snow. Is it true that meteorites can also be found elsewhere such as beaches, streets or even embedded in a concrete building. It is just very hard to distinguish them from plain rock on earth?
Yes you can find them anywhere on Earth. The thing is that by the time they reach the Earth's surface, these meteorites are very small, usually ranging from microscopic to dust sized particles. Searching How big does a meteor have to be to make it to the ground?


  In this sense, most all meteoroids that enter the atmosphere make it
  to the ground, in the form of microscopic dust.


As you said it is easier to find meteorites in snow because it is white and contrasts with the usual colour of meteorites. It would be very hard to try and distinguish those small particles with the normal soil on Earth. As for finding one randomly in a concrete building... the chances are very low and it possibly would have done some noticeable damage to the building.

A rather simple experiment to prove that yes you can find it anywhere on earth, follow this example. This is to search for micrometeorites. I have done this before and I found it to be particularly inefficient as it is rather wind in my area, but hey you might find it different.

You can attempt to search for meteorites somewhere else but just don't expect to see large chunks of it lying around.