Building knowledge offers a construction speed bonus for all buildings in Vikings War of Clans.
Building knowledge is one of the most important boosts in the economics knowledge tree, substantially reducing your construction times.
Once maxed you will have increased your build speed boost by 66%.
The table below outlines the cost in materials, requirements and rewards for each research level of Building.
Please help us fill in the gaps by filling in the blanks below on the table and submitting any data you have from Vikings War of Clans.