Same business but buildings split between multiple locations

How would you let customers know that you have more buildings as part of the same facility? I have some buildings in one location and more buildings a block away. How do you let people know that they are part of the same business? The buildings look the same, but you can't see the other location while you are at one of them. I thought about adding a sign at each location that would show a Google Map outlining the different locations. This way people know they're all part of the same business. Maybe it's not needed, and I'm overthinking it.

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Same business but buildings split between multiple locations