Combining Downtime Rules with Kingdom Building
Any kingdom building brings no benefit to any individual PC unless they invest gold, time or manpower to it to get the listed downtime benefits. If the building already exists they need only pay for a team or other npc to begin this.
If a town has a building already in existence that is providing downtime benefits but has not had build points invested in it then it provides no kingdom benefit. It does however provide a BP discount according to its construction cost originally equal to 1 BP per 4000 gp construction cost – fractional BP are possible.