Hello, I have a question regarding the builders, is there a limit on builders when the populations reach almost 1000? or any recommendation, I have noticed that they take a long time to repair, I don’t know if there is a problem with the distance of the deposits with the materials, or few builders, between (850) populations, I maintain 55 builders.
population between 850 and 900
IIRC, the current cap on builders is 100- 10% of a 1000 pop village.
Which makes sense to me- I tend to run 10% of pop as builders, and don’t have issues with a 450 pop village having repairs not getting done, though I can usually get by with a few under the 10% threshold.
Keep in mind I am playing Trailblazer Pacifist Mode, so I have no need to draft villagers into military service, so I have more flexibility than my husband does- he is playing Trailblazer Regular- raiders and bears and wolves, oh my! He has more trouble with getting builders to build walls and buildings and wells and do repairs (all at once) than I do. He has about 7% of his pop as builders, slightly higher than your builder numbers. He’ll raise the number of builders and cut back on laborers when mass repair events happen, then take the number back down once the repair rush is done.
Works for us, but YMMV.
That’s how I do it as well. My 1,000 pop town has 100 builders. Rarely are more than 20 active at a time.
30 is enough for 1000 pop village if you don’t build walls anymore. Everyone else has to grab a sword and shield 
Builders that aren’t needed for building or repairing will join the pool of normal workers anyway. If your builder slots are all full, and you have spare workers, then you should increase your builder cap.