4. Immigrants: There are roughly 40 million foreign-born people living legally or illegally in the United States today, and this demographic is expected to grow swiftly in the coming years. McIlwain notes that immigrant populations tend to cluster together. "These clusters have moved from the central cities where they tended to gather in the past to the inner suburbs over the last two decades," he says. Housing demand from immigrants may one day flow to the larger suburban homes that are expected to face downward pricing pressure in the coming years. "The reduced prices of these homes and their larger size … make them an attractive option for larger immigrant families, though prices will have to drop considerably for this to happen," McIlwain says.