Castleville game has many buildings to choose from houses to royal buildings.
It's important to place the buildings where it will produce more coins for you, the ideal placement for houses, craft buildings and royal buildings is on a courtyard.
The courtyard can be found in your market decor under road tab
When you pick your courtyard and place it in your kingdom then you are ready to build your buildings, Buildings produce grater coin when they are placed on courtyard
The same goes for craft buildings and houses. Craft buildings produce faster when are placed on courtyards