Our prefab faves have a lot in common. First, they can cost less than a traditionally built home (depending on customization). Second, they save time: typically, a prefab takes 50 percent or less time to construct than a traditional home, which translates into financial savings on labor. Third, components and panels are fabricated in a climate-controlled factory, delivered to the site, and assembled on-site—limiting construction waste. And finally, sustainable strategies, from solar arrays to low-VOC finishes, are incorporated. Some are even customizable to net-zero, net-positive, or off-grid. Let's take a look.

1. Cocoon9: Micro Home

New York-based Cocoon9, a designer and manufacturer of prefab dwellings, has created a collection of micro homes. The company describes them as "plug-and-play houses with the sophisticated features of a custom home or luxe resort." Cocoon9 has introduced three-floor plans: The Cocoon Cabin (a one-bedroom prefab); and the Cocoon Studio and Cocoon Lite 20, which both have open-plan layouts.