materialicious recently covered a home in Michigan called Cottage in a day by architect Michael Fitzhugh:

Cottage in a Day is a modern, modular pre-fabricated structure based on a 14 foot square module. The cottages are built using structural insulated panels for floor, walls and roof....

Once transported the cottage modules were then assembled in five hours.

The company offers 4 models:

Model	Price	Size	BR	Baths
1414-S	$52,000-$56,000	182-282 sf	0-1	1
1428-S	$115,000	375-570 sf	0-1	1
1428-SB	$117,000	375-570 sf	0-1	1
142814-L	$152,400-$156,500	375-570 sf	1-1.5	1

Check out the assembly videos on their website.