Here is a graphic from The Economist showing the least affordable houses globally.The Survey from Demographia ranks urban housing markets into four categories based on their Median Multiple, from “Affordable” (3.0 or less) to “Severely Unaffordable” (5.1 & Over)
Severely unaffordable markets are also more attractive to buyers seeking extraordinary returns on investment and short term profits. This further raises prices in markets where urban fringe development is largely prohibited by urban containment’s land rationing policies. Substantial international investor activity has been reported in London, Vancouver, the US West Coast markets of Vancouver, Seattle, the San Francisco Bay Area, Los Angeles and San Diego and others. These price increases make such metropolitan areas less livable for average and lower income households.
The key to preserving housing affordability is a “competitive land supply,” which appears to be incompatible with urban containment policy both in economic theory and practice. Further, out-of-control house price escalation destabilizes economies, retarding metropolitan area economic growth and job creation.