The million dollar plus segment of the housing market is thriving, with new records being set in recent months. A single family home in the Ridges in Summerlin, set a local high mark in July when it sold for more than $1000 a square foot. A week later, a penthouse on the Strip sold for $904.53 a square foot, and this for a “gray-shell” home – no flooring, wall coverings, appliances, lighting.