We reported last year on retailer IKEA's prefab homes. More from The Guardian:

Britain's first "Ikealand" opened its metal-panelled pine doors yesterday in an experiment designed to spread the company's off-the-shelf principle from wardrobes and sofas to entire houses.

The first of 93 flatpack homes designed and equipped by the household goods store went on show in Gateshead on Tyneside, where scores of would-be buyers are being vetted to ensure that their savings and income are modest enough to qualify....

Prices on the cul-de-sac off Marigold Avenue, where each unit comes with 22 Skimmia shrubs and an apple tree in the garden, range from £99,500 [$198,000] for a one-bedroom flat to £149,000 [$295,000] for a three-bedroom house...

Treehugger adds:

Seen as a way for them to get onto the property ladder, these houses will sell for $260,000 for a two bedroom townhouse. Assembled in a factory nearby, they get to the site ready to be bolted together and take about 16 weeks from start to completion.

The system is called BoKlok (Ikea speak for smart living) and was developed in conjunction with Ikea.

I did a little research on prices in the area; these look competitive.