I want to make a simple argument and I want to make it clearly.
In 1970, a median-income American family could afford a median-priced home. Today they cannot. That happened over 50 years while we had politicians, economists, builders, and urban planners all looking at the problem. So what changed?
Zoning laws changed. Single-family only zoning expanded across virtually every suburb in America. Minimum lot sizes went up. Height limits went down. Parking minimums got added. Environmental review processes that used to take months started taking years. And every single one of those changes was pushed by the same group of people: existing homeowners who did not want more neighbors.
The mechanism is not complicated. When you own a home, your home is worth more if fewer homes exist near you. Supply and demand. Homeowners figured this out and they organized. They show up to city council meetings. They file objections during comment periods. They vote for local officials who promise to keep the neighborhood exactly as it is. And it worked. They kept supply artificially low for half a century and now a teacher and a nurse cannot afford to live in the city where they work.
I am not saying every homeowner is evil. I am saying the collective political behavior of homeowners as a class has directly caused the housing crisis. They voted for scarcity. We are all living in it now.
The data backs this up. Cities that built housing — Minneapolis, which eliminated single-family zoning in its 2040 plan, Tokyo, which has liberal zoning and stable rents — have more affordable housing than cities that did not. The experiment has been run. We know what works. The only reason we are not doing it is that the people who already own homes have more political power than the people who need homes.
Look I get the frustration. I really do. I grew up in a small town in Iowa where housing was never the issue and then I moved to Des Moines five years ago and suddenly a two bedroom apartment is $1,400 a month and I am like what is happening.
But I think the NIMBY argument, as satisfying as it is to have a villain, is missing most of the actual problem.
Here is what I know from just watching things around me. Construction costs are up. Like way up. Materials, labor, everything. A contractor I know said he cannot build a new house for under $200 per square foot right now. That is before land. That is before permits. When it costs that much to build, you can loosen every zoning law in the country and developers are still going to build luxury units because that is where the margin is. The people who need affordable housing are not going to get it from market rate construction no matter how much you build.
Interest rates went to 7% and basically froze the existing housing market. People who bought at 3% are not selling. So inventory dried up not because of zoning but because of monetary policy.
Corporate landlords bought up single family homes after 2008 at scale. That removed inventory from the owner-occupied market in ways that zoning has nothing to do with.
I am not saying NIMBYs are innocent. I am saying if you fix zoning tomorrow and nothing else changes, housing does not become affordable. The problem has five causes and your argument picks one and blames the most sympathetic villain. Real villains are harder to see.
You said construction costs are too high for affordable housing even with looser zoning. I want to push on that because I think it proves my point more than yours.
Why are construction costs high? Labor shortage in skilled trades — partly because exclusionary zoning means construction workers cannot afford to live near where they work. Material costs — real, but they apply everywhere, yet Tokyo still manages to build affordable housing at scale. Permitting and review costs — directly caused by the regulatory environment that homeowners fought to create.
The luxury units argument is the one I hear most and it is the one I find most frustrating because it ignores how markets actually work. Yes, developers build luxury first because that is where the margin is. And then those units filter down. A luxury unit built in 2005 is a middle-income unit in 2025. The people in the middle-income units move up. The people at the bottom of the market have more options. This is called filtering and it is how housing markets have always worked when supply is allowed to grow.
The reason filtering stopped working is that we stopped building. Not because of construction costs. Because homeowners blocked construction through zoning.
Your interest rates point is real but it is a recent phenomenon. The affordability crisis has been building since the 1970s. You cannot explain 50 years of declining affordability with interest rates that have only been high for two years.
The filtering argument is actually something I had to think about because you are right that it is how markets are supposed to work. My counter is that filtering works when you are building enough to actually move the needle, and we are so far behind on housing supply that the luxury units being built today are not going to filter down to working class price points within any timeframe that helps the people who need housing now.
Minneapolis is your best example and I looked it up after your opening. They eliminated single family zoning in 2019. Rents in Minneapolis have gone up since then, not down. Now there are reasons for that — inflation, interest rates, the overall national shortage — but it shows that even aggressive zoning reform does not automatically produce affordable housing in the short run.
The corporate landlord thing I want to come back to because I think you are underweighting it. Invitation Homes and similar companies own hundreds of thousands of single family homes that used to be owner-occupied. That is not a zoning problem. That is a financialization problem. And it requires a completely different solution — vacancy taxes, restrictions on institutional ownership of single family homes, tenant protections — that have nothing to do with the NIMBY argument.
I am not defending NIMBYs. I am saying the villain story is too simple for the actual complexity of the problem and simple villain stories lead to simple solutions that do not work.
Minneapolis is worth engaging seriously. You are right that rents went up after 2019. You are also right that multiple factors contributed. But here is what the University of Minnesota research actually found when they studied it: rents in Minneapolis rose significantly less than comparable Midwestern cities that did not reform zoning. The comparison matters. The counterfactual matters.
And I want to address the corporate landlord point directly because it has become the favorite alternative explanation and I think it is mostly wrong at scale. Institutional investors own about 3% of single family rental homes in the United States. 3%. The overwhelming majority of single family rentals are owned by individual landlords with one or two properties. If you eliminated all institutional ownership tomorrow, housing costs would barely move. The scale is not there.
What is at scale is the zoning constraint. About 75% of residential land in most American cities is zoned exclusively for single family homes. That is the supply constraint. That is why building is expensive. That is why rents are high. Everything else is a contributing factor. This is the cause.
The 3% number on institutional ownership — I actually did not know that was that low and it does weaken my argument on that specific point. Fair.
But I want to hold onto the construction cost argument because I do not think you have actually answered it. The Minneapolis comparison shows that zoning reform helps at the margin. It does not show that zoning reform alone produces housing that working class people can afford. The new units going up in Minneapolis after the zoning reform — who do you think is living in them? Not teachers and nurses. People making six figures.
The filtering argument requires time. A lot of time. Like decades. And during that time real people are being priced out of cities right now. So even if you are completely right about zoning being the primary cause, and I think you are partially right, the solution you are pointing toward — liberalize zoning and wait for the market to filter — requires working class people to wait 20 years for relief while developers make money on luxury units.
I do not think that is an acceptable answer even if the economics are correct. We need direct intervention. Affordable housing mandates in new developments. Public housing investment. Tenant protections in the interim. Zoning reform yes — but as part of a package, not as the whole answer.
My opponent moved more than I expected. He conceded the institutional investor argument was weaker than he presented. He conceded zoning reform helps. We ended up arguing about speed and about whether market solutions are sufficient — which is a real and honest disagreement.
Here is where I land. The housing crisis is primarily caused by the artificial restriction of housing supply through zoning laws that homeowners fought for and maintained over 50 years. That is the cause. The solutions my opponent mentioned — affordable mandates, public housing — are not wrong but they are downstream of the supply constraint. You cannot mandate your way to affordability when building itself is prohibited or made impossibly expensive by regulation.
Homeowners did this. Not maliciously, mostly. But they organized politically to protect the value of their asset and the character of their neighborhood, and the result was a catastrophic shortage that is making the country dramatically less livable for anyone under 40. Naming that cause is not finding a convenient villain. It is being accurate about how we got here.
I started this debate wanting to push back on what felt like an oversimplified argument. I still think it is oversimplified. The construction cost problem is real. The interest rate freeze is real. The financialization of housing is real even if I overstated the institutional investor piece.
But I will be honest — my opponent made me think harder about the zoning argument than I expected to. The 75% single family zoning number is genuinely alarming. The Minneapolis comparison is more favorable to their case than I wanted to admit. And the filtering mechanism, even if it is slow, is how markets work when they are allowed to.
Where I end up: zoning reform is necessary and homeowner political resistance to it is a real and significant cause of the housing shortage. My opponent is right about that. They are wrong that it is the only cause and wrong that market solutions alone are sufficient. We need zoning reform and direct intervention and tenant protections simultaneously.
But if I had to pick the single biggest cause of the housing crisis, I would probably say zoning now. Reluctantly. That is a genuine update from where I started.