Modding

Building bonuses – it depends on what is meant. The values of creature growth rates are related to the files of the creatures themselves. The parameters of some special buildings for cities can be found in DefaultStats. The files that define the mechanics of buildings can be found in GameMechanics/TownBuildingSharedStats.

I edited the creature growth rate values in the creature cards, and as a result, I got increased respawn rates for neutral creatures, which, for me personally, negated the point of increasing the growth rate.

I searched in this file and in this folder – the maximum I could find was the cost of buildings and bonuses from special buildings; it seems that the bonuses of ordinary buildings are hidden very deeply.