I've completed all the projects requiring building skills (statue, all huts, and clearing the rubble and leaves), but I haven't achieved the jack of all trades award yet. All of my villagers with enough building skill to attempt the award are too old to actually max them out on other skills. I know you can repair huts to gain building skills, but can you gain enough to become a master builder?

Also, does the bar need to be completely filled, or does the villager just have to have the master builder tagline?