Ah- my question was answered when the mother of my 12th villager got pregnant again before I changed her from parenting- and a new hut structure appeared. I have put my adept builders on it and fed my two elderly master builders a rainbow health stew and now will hope for the best....

I was able to have the first hut repaired over and over but it never did result in master status and finally said it was in good shape, lol!