According to U.S. Self-Storage Property Metrics (Moody’s Analytics/Reis Inc.) rent declines are more prevalent in the Southwest than the West due to over-development. It would be wise to study the market trends of supply and demand for this popular investment asset. The self-storage industry has plateaued and future supply growth is expected to slow considerably. Vacancy rates and rents should remain flat in most metro areas, with the exception of the Western regions.