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by woodruffw 817 days ago
I’ve seen modern townhomes and apartments in Maryland with shared electrical and HVAC; not sure about plumbing. I’ve also seen constructions in North Carolina with shared electrical and plumbing, although each unit had its own HVAC.

(I don’t have a sense of expense for any of these things, but I assume they wouldn’t build them this way if there wasn’t some economic envelope that they fit into.)