• We have updated our Community Code of Conduct. Please read through the new rules for the forum that are an integral part of Paradox Interactive’s User Agreement.
How do I add less construction costs/quicker building buff or debuff to certain tech?

What I want is to add some buffs/debuffs to construction speed of buildings tied to tech, a'la companies that get bonus to their construction.
 
How do I add less construction costs/quicker building buff or debuff to certain tech?

What I want is to add some buffs/debuffs to construction speed of buildings tied to tech, a'la companies that get bonus to their construction.
If you mean construction efficiency, you're looking for the state_construction_mult modifier. If you mean for a specific building, that is not possible to my knowledge as of the current patch.