Antmanbrooks
Prince
Are you modding BTS or some other mod? Many mods have civic buildings (building is only active with the specified civics).
Rise of Mankind - A New Dawn 2 and C2C for example has this feature (I think KMOD too. I heard many advising to mod KMOD instead of BTS)
BTW I also have a modmod compilation for AND2 (http://forums.civfanatics.com/threads/zns-addons.523763/page-24) and one of them is about civics.
You can try it for more ideas and I also would like to see yours
I'm modding Realism Invictus, but I'm not part of their team. It's just for fun right now as I'm more or less a total learner to modding. My intention is to rework all the civic choices. Now you mention it, it might be worth creating a new civic building, but I really like the idea of certain civics amending the output of buildings that are available throughout the game regardless of the civic. I'll take a look at your modmod but I wouldn't currently know where to start with adding your modmod to RI. But I might be able to cut & paste xml lines for shortcuts! Thanks. You're more than welcome to have a look at the work I do once it's complete (I'll try and remember once it's done and let you know) but it's slow going and depending on the success/failure, might not be completed at all!