At times of uncertainty and displacement, self-storage becomes a hotter commercial real estate sector. Even as the pressures from the recession have begun to wane and demand has stabilized, the sector still has plenty of run room. Look at World Class Holdings’ sale of a 64-property self-storage portfolio to CBRE and facility operator William Warren Group/StorQuest for $588 million. That’s a lot of spare mattresses, old bicycles, and boxes of books that are waiting for transport to a new location.