You are moving to Warsaw and you need a house. Good! You reached the proper place.
Most of Exapts search for houses in proximity of the International Schools, so the most popular areas to live are Konstancin, Wilanow and Mokotow.
In this areas the houses in Warsaw are the most expensive.
If you do not have kids and you are looking for a house in Warsaw, other districts like Zoliborz or Ochota are worth considering.