Vok 250441,888 Locked 07 Sep 2017 07 Sep 2017
Rebuild every building in Bleepside Lake. All the buildings are located in the lower area near the water.
In order to rebuild you are going to need a decent amount of rare resources and a lot of wood. I found that the fastest way to earn resources was by completing quests in the 3 towns. Quests sometimes reward you with bundles of 3 wood or 3 stone. Completing these earned me enough resources to get all three building achievements without having to replay levels.
Note: Certain building are more expensive to build than others. If you have already unlocked "Supreme Builder" then you should only build "Blueberry", "Green Tea", and "Council"/"Industry" to optimize your resources.
While doing quests, keep an eye out for hidden resources around each town. I don't know what makes them spawn, but I was able to find about 6 wood and 8 stone in Crater Peaks when I backtracked after beating the campaign. You can also ground pound certain logs in Lowleen town to find resources. Another tip is to check your map when you are done questing. resources you were close to, but did not pick up, will be marked on your map.
You can also find resources in each town using your unlocked abilities. These do not respawn as far as I could tell. The mouse suit rewarded me with gold and boxes consistently.