I don’t know about you, but I can barely wrap my head around the idea of making some plastic trinket with 3-D printing, much less turning out a whole home! But it’s happening. The country’s first 15 home Community of 3-D printed homes will be built in Rancho Mirage, CA and are scheduled for completion by next spring.

The project is a collaboration between Beverly Hills green homes developer Palari and Oakland based housing technology company Mighty Buildings. According to the LA...