Can a new steam system be installed in a new residential house?

I was hired to remove a steam heating system from a 3,000 square foot, 2-level apartment in Manhattan a couple years ago and repipe it independently from the rest of the 8-story building’s central steam system. It was, by any measure, a new downfeed steam heating system with two new overhead mains, new decorative radiators and hardware, and steam valve controller. It’s a little different from what you’re asking but I think it qualifies.

Good question! No. The building has a boiler. So I guess it was a whole system…minus a boiler. I cheated.