When renovations in 2007 perched a partial second story atop a 1957 ranch-style home in Willow Meadows, several original rooms gained high clearance (top). The project anchored its new load with 59 bell-bottom piers below and gutted out the plumbing, wiring, and lighting fixtures, among other tweaks. A week ago, the property was listed on the market with a $639,000 asking price. It had last changed hands in 2007, for $520,000.