Building Licences

[Teltrab]

Do all buildings cost the same number of licences?

[Tierarzt]

All building cost one licence.
Stone mine and marble mine are placed by the game and are not not classified as buildings.
Fields and wells are resources and don't use licences.
Any building purchased from the BlueByte store does not require a licence.

[howbut]

Do I have the license back by demolishing existing building? Same exhausted copper mine?

[Dilbe]

Do I have the license back by demolishing existing building? Same exhausted copper mine?You get the licence back when the building is demolished. An exhausted mine gets demolished when it is depleted, so you got your licence back then. There is no need to destroy the exhausted mine.