Each episode of "Extreme Makeover: Home Edition" is self-contained and features a race against time on a project that would ordinarily take at least four months to achieve, involving a team of designers, contractors and several hundred workers who have just seven days to totally rebuild an entire house -- every single room, plus the exterior and landscaping. / The lives of the lucky families are forever changed when they learn that they have been selected to have their home walls moved, their floors replaced and even their façades radically changed. The result should be a decorator's delight… if it can be done in time.