Over at Greater Greater Washington, Ms. Cheryl Cort attempts to temper expectations of what she calls the “libertarian view (a more right-leaning view in our region)” on affordable housing. It is certainly reassuring to see the cosmopolitan left and the pro-market right begin to warm to the benefits of liberalization of land-use. Land-use is one area the “right,” in it’s fear of change, has failed to embrace a widespread pro-market stance. Meanwhile, many urban-dwellers who consider themselves on the “left” unknowingly display an anti-outsider mentality typically attributed to the right’s stance on immigration. Unfortunately, in failing to grasp the enormity of the bipartisan-caused distortion of the housing market, Ms. Cort resigns to advocate solutions that fail to deliver widespread housing affordability.

Yes, adding more housing must absolutely be a part of the strategy to make housing more affordable. And zoning changes to allow people to build taller and more usable space near transit, rent out carriage houses, and avoid expensive and often-unnecessary parking are all steps in the right direction. But some proponents go on to say relaxing zoning will solve the problem all on its own. It won’t.

Well, if “relaxing” zoning is the solution at hand, she may be right – relaxing will only help a tad… While keenly aware of the high prices many are willing to pay, Cort does not seem to grasp the incredible degree to which development is inhibited by zoning. “Relaxing” won’t do the trick in a city where prices are high enough to justify skyscrapers with four to ten times the density currently allowed. When considering a supply cap that only allows a fraction of what the market demands, one can not reasonably conclude “Unlimited FAR” (building density) would merely result in a bit more development here and there. A radically liberalized land-use regime would deliver numbers of units several times what is permitted under current regulation.

Ms. Cort correctly concludes that because of today’s construction costs, new construction would not provide housing at prices affordable to low income people. This will certainly be the case in the most expensive areas where developers would be allowed to meet market demands by building 60 story skyscrapers. Advocates of land-use liberalization who understand the costs of construction would not claim that dense new construction will house the poor. But if enough supply is allowed to come to market today, today’s new construction will become tomorrow’s affordable housing. And this brings us to the more meaningful discussion: filtering. Here’s where Ms. Cort’s analysis completely falls apart.

It is true that increasing supply eases upward pressure on all prices. But the reservoir of naturally cheaper, older buildings runs out after a while.

Tragically, Ms. Cort is using the current radically supply-constrained paradigm to analyze a free-market counter-factual. If development at levels several times the current rate were allowed over the past few cycles, the reservoir of cheaper, older buildings would have remained plentiful and affordable. If the market were allowed to meet demand for high-end units in the form of dense new construction, there would be little or no market pressure for unsubsidized market-rate units to be converted into luxury units. The 1400 Block of W Street NW example she gives would almost certainly still be affordable.

On a larger scale, the increased supply of housing in the area helps absorb demand for more housing, but it’s not enough to stem the demand for such a sought-after location. Between 2005 and 2011, the rental housing market’s growth added more than 12,500 units. But at the same time, $800/month apartments fell by half, while $1000/month rentals nearly doubled. Strong market demand will shrink the availability of low-priced units. That’s what has happened over the last decade as DC transformed from a declining city into a rapidly growing one.

But, 12,500 units is the amount of supply added under the current over-regulated regime. This amount of development is minuscule in a large city. (see diagram below) What if DC allowed as much supply growth as Austin or Miami? The 12,500 figure would triple. Further, since Austin and Miami are far from free-market, the development rate in a truly free-market DC would certainly exceed a tripling. If you consider the amount of supply that would have been added over the last several decades in an unlimited FAR DC, Ms. Cort’s position starts to sound quaint. Conservatively assuming 50-100,000 units of rental housing would have been developed over the last few decades of DC’s growth, rents certainly would not have doubled. I’ll go out on a limb and estimate that average rent growth would be close to inflation.

Ms. Cort wants housing to be less than 30% of gross income for nearly all residents. Will the market provide new housing affordable to minimum wage earners at the most expensive intersection in Georgetown? Probably not, and I hope she isn’t setting the bar that high. While nobody is wise enough to know whether a free-market in land use would accomplish this, a free-market DC could be affordable to 50-100,000 more people than the zoned-to-death DC of today. Will stock of units deemed affordable to low wage earners be of the quality, location, and size acceptable to Cort? The necessity for further intervention is a subjective preference.

While acknowledging the validity of liberalization in her critique of supply-and-demand denialism, Cort’s conclusion fails to look at supply and demand wholistically:

Supply matters, but it’s not the whole story

Wrong. Supply really must be part of the whole story. A city is only affordable to the number of residents it houses affordably.