The data for all buildings is near completion. Here I post the link in the guide section for better reference. If you have the missing info in the spreadsheet, please post the info here and I will update it later.
Special thanks to ccprestine, Gazelle, Battou1, Sandseven and Iam2awesome, as well as all contributors to US, JP wiki and TW forums.
How to use
1. To switch between different types of buildings, click the label at the bottom
2. The total amount of time to upgrade all buildings to level 20 is about 2100 builder-day.
So if you have 5 builders, it takes around 425 days to finish them all.