As with other terrain elements, players should identify at the start of the game all pieces of terrain for which they are going to make use of the buildings rules given here. This is important, as during the game these rules may give a clear advantage to some units.

As with any terrain pieces, a small amount of common sense will go a long way when dealing with buildings. Players may agree to treat some buildings as impassable (very small ones, or those with a strange shape, for example). Similarly, players may want to divide very large buildings into several parts, each of which counts as a separate building for the purposes of the following rules. We'll discuss that in a little more detail later – for the moment, let's take a look at the overall rules for buildings.