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What are the proximity bonuses for adjacent buildings and when do they apply?

I know that building anything beside a workshop gives an immediate benefit upon completion in the way of a 7% rebate on the cost of the building.

Which buildings receive ongoing rebates thereafter? Foundry? Psi Labs? Officer Training?

I've noticed I get that green linking + icon if I build two adjacent workshops, but I can't figure out what is for.

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marked as duplicate by fredley, Private Pansy, kotekzot, MBraedley, Krazer Oct 16 '12 at 12:27

This question has been asked before and already has an answer. If those answers do not fully address your question, please ask a new question.

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The green plus sign is the adjacency bonus. The more of these you have between workshops, the bigger the rebate you are going to get. Building a facility other than a workshop next to your workshops will not benefit you.

As the tooltip says, you will get rebates depending on the number of your adjacency bonuses when building vehicles, facilities and foundry projects.

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Ok, worked it out (from this post). Build the same building next to each other to get the benefit described proceeding Adjacency Bonus globally thereafter. – antak Oct 16 '12 at 13:20

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