Lose resources for deleting building foundation

Age of Empires II: DE II - Discussion
36

Given that everything else in the game is cancellable for free, why do you want just placing building foundations to have a cost.

I prefer Warcraft 3 system in regards to this. In that game:

  1. All resources are refunded if construction is not started.
  2. 75% of the resources are refunded, if construction is started but enemy has not attacked it yet.
  3. If the enemy has damaged the structure, then the percentage damage done by the enemy is not refunded. The minimum of 25% resources lost still applies.
  4. All structures are unarmoured during construction. This often means that units do about double damage to them.

So if you complete a building 80% and delete it, you get 75% resources back. If you build it 80% and the enemy damages it by 60% of max HP, you only get 40% resources back. The reason I prefer this method is that it punishes castles of Doubt to a lesser extent.