This is interesting. A retailer called Design Within Reach (NASDAQ:DWRI) is now offering prefab:

Designed by Tom Sandonato and Martin Wehmann, this 9'x13' structure redefines conventional prefab with its proprietary clamping system that makes installation quick, economic and practically waste-free. What also caught our attention about Kithaus is how it can tuck into any area, even remote locations, without needing ultra-heavy equipment. All of the lightweight, anodized aluminum pieces are pre-cut and drilled in Southern California and shipped to you for on-site assembly. Installation is fast, taking only a few days, and Kithaus is built with eco-friendly components.

Treehugger thinks it's a good idea:

This is fulfilling the promise of prefab: Architecture as industrial design, available to anyone off the shelf at any time. Architecture as product instead of service, possibly the future and salvation of the profession.

To support the sales of the kitHAUS models, a number of in-store events will be held:

A little history of Design Within Reach:

Design Within Reach is the source for fully licensed classics. Our business started when our founder tried to furnish his apartment with the mid-century classics he'd come to appreciate while living in London.

Design Within Reach, Inc. is recognized nationwide as a preeminent provider of distinctive modern design furnishings and accessories. The Company markets and sells products in numerous categories to both residential and commercial customers through the DWR catalog, website and studios.