Slitherine

Apologies if I am repeating a question but I can not see this question in the forum

I select a building - e.g. tier 1 agriculture - and it does not have a turns before completion number. I can afford it and I believe I cover the requirements, as well as it saying I have enough building slots. Am I missing something?

Do you have positive production?

by positive production are you referring to food production?

Metal production is +9
food productions is positive
I have negative infrastructure in the three areas effected due to national modifiers

Addendum: I think I have solved it thanks - if I have negative infrastructure I can not build

Usually no time limit means no production due to unrest...

Thanks - also if you have negative infrastructure - no slaves or citizens in means you can not build as well.