"Free Exchange" in The Economist has come down strongly on the side of economics in a review of housing affordability.
According to The Economist, the unusually high cost of housing in San Francisco (and other places) is principally the result of tight land use regulation, which makes it expensive or impossible to build. If "local regulations did not do much to discourage creation of new housing supply, then the market for San Francisco would be pretty competitive." Add to that Vancouver, Sydney, Melbourne, Toronto, Portland and a host of additional metropolitan areas, where urban containment policy has driven house prices well above the 3.0 median multiple indicated by historic market fundamentals.
The Economist explains the issue in greater detail: "We therefore get highly restrictive building regulations. Tight supply limits mean that the gap between the marginal cost of a unit of San Francisco and the value to the marginal resident of San Francisco (and the market price of the unit) is enormous. That difference is pocketed by the rent-seeking NIMBYs of San Francisco. However altruistic they perceive their mission to be, the result is similar to what you'd get if fat cat industrialists lobbied the government to drive their competition out of business." (Our emphasis).
Of course urban planning interests have long denied that that rationing land is associated with higher housing prices (read greater poverty and a lower standard of living). Nonetheless urban containment policies not only drive up the price of land, but do so even as they reduce the amount of land used for each new residence, driving prices per square foot of land up as well.
The Economist notes that unless the direction is changed, housing policy will continue to be "an instrument of oligarchy. Who knows. But however one imagines this playing out, we should be clear about what is happening, and what its effects have been."