There is more than 1.9 billion square feet of available self-storage in space in U.S. The six largest publicly traded storage operators (four REITs, and U-Haul own or operate approximately 18% of self-storage facilities.[6] The industry is worth $38 billion in 2018.[7] More recently, in many metropolitan cities where competition among storage companies is fierce, better parcels of land near residential and commercial areas are being converted into self-storage once approved by zoning panels. Companies are becoming more adept at manufacturing these modular storage units, allowing operators to get up and running quickly. To support the need, businesses like PODS are expected to enter the modular construction effort as well.