Buildings and base roles

Buildings define a base’s production, logistics, military output, storage, and defensive specialization. Source

Evidence status — confirmed: Unless noted otherwise, mechanics are verified against the installed patch 11.73 guide.

Most structures cap at 20. Dyson Sphere caps at 200; Flagship Research at 5.

actual build time = listed build time / build-speed multiplier

Build speed comes from Central Spire, Flagship Research, Eldritch upgrades, directives, and SPUs. Astraean normal building speed receives a 0.60 multiplier, so Astraean expansion needs planning rather than improvisation.