Housing
The affordability crisis that has reshaped politics in nearly every developed country. The wealth-concentration mechanism inside it. The structural reasons it is so hard to fix.
(roughly three times global stock market value; the world's largest single asset class)
(historically about 3-4x in most developed-country housing markets)
(up from about 25% a generation ago)
A note on framing. Housing is one of the most personally consequential topics on this site and one of the most politically charged. The page below tries to walk through the structural picture - what is actually true, what has changed, what reforms have been tried, what worked and what did not - in a way that respects the reader's intelligence regardless of whether they currently rent or own. The trade-offs are real, the politics is hard, and the data is more useful than the slogans on either side.
The new normal of unaffordability
Across most developed countries, the cost of buying a home has roughly doubled relative to incomes over the last 30 years. In a number of major cities the ratio has tripled or more. The pattern is consistent across countries with very different politics: the United States, the United Kingdom, Canada, Australia, Ireland, the Netherlands, Sweden, South Korea, parts of Germany, parts of Spain. The same structural shift, with local variations.
The numbers tell the story. In the United States, the median home now costs about five times the median household income, up from about three times in the early 1990s. In the major coastal cities (San Francisco, Los Angeles, New York, Boston, Seattle) the ratio is closer to 8-12 times. In London, Sydney, Toronto, Auckland, Vancouver, Amsterdam, and a long list of other global cities, the ratio is similar or higher. In Hong Kong it is over 18 times.
Renting tells the same story differently. Rent-to-income ratios have risen across the developed world. The traditional rule of thumb that housing should consume about a third of income has been replaced by a reality where 40-50% is common in major cities and 60% or more is not unusual for households at the lower end of the income distribution. The Department of Housing and Urban Development in the United States classifies any household paying more than 30% of income on housing as "cost-burdened"; about half of US renter households now meet that definition.
The consequences of this go well beyond housing. Family formation has been pushed later because young couples cannot afford homes they want to start families in. Geographic mobility has fallen because moving for a better job often means losing access to a desirable housing market. Saving rates have fallen because more income goes to housing. Generational wealth gaps have widened sharply because older homeowners have benefited from rising prices while younger households have not been able to enter the market. None of these is a trivial second-order effect; together they are reshaping how a generation is living its adult life.
Why housing decoupled from wages
Five forces working in roughly the same direction explain most of the shift, and they have largely not reversed.
Land-use restrictions tightened. The post-1970s wave of zoning, environmental review, historic preservation, and neighbourhood-protection regulations across most developed countries made it much harder to build new housing in the places where demand was highest. Single-family-only zoning in much of urban America. Strict height limits in most European cities. Lengthy approval processes everywhere. The supply response that would historically have answered rising prices was structurally weakened.
Interest rates fell for thirty years. From 1981 to 2021, mortgage rates fell from over 18% to under 3% in most rich countries. Lower rates mean larger mortgages can be afforded on the same income, which lifts what buyers can pay, which lifts prices. Most of the price-to-income increase from the 1990s through 2021 traces to lower interest rates. The post-2022 rise in rates has not unwound this fully because the housing supply problem has worsened in the same period.
Tax and subsidy systems favoured owning. Mortgage interest deductions, capital-gains exclusions on primary residences, lower property taxes on owner-occupied homes, and government support for mortgage lending all subsidised housing demand. Each of these had reasonable individual justifications. Together they amplified the price effects of rising demand and falling supply.
Cities became more economically concentrated. Productive economic activity has clustered in fewer cities than it did in the 1970s. The "superstar cities" attract a growing share of high-paid jobs; medium-sized cities and rural areas have not gained at the same rate. With more people wanting to live in fewer places, prices in those places have risen sharply. The technology and finance sectors particularly drive this clustering.
Housing became an investment asset. The combination of rising prices, favourable tax treatment, and sustained inflation since 2020 has made housing more attractive as an investment rather than just as a place to live. Foreign capital, professional landlords, short-term rental platforms, and large-scale single-family-rental investors all add demand pressure on top of the demand from people who actually want to live somewhere. The consequences are debated; the pattern is real.
Housing as wealth-concentration vehicle
For most non-wealthy households in developed countries, home equity is the single largest piece of wealth. About two-thirds of US wealth held by middle-class households is in home equity. Most retirement security in the United Kingdom and Australia rests on home values. Home ownership has been the most successful wealth-building tool ordinary people have access to.
That same fact is what makes the affordability crisis politically difficult. Older homeowners have built substantial wealth through the price rises of the last 30 years. Their political and economic interests run against any policy that would substantially lower house prices. Younger renters have the opposite interest but tend to vote less and have less political power. The structural conflict between these two groups is one of the central political tensions in nearly every country with the affordability problem, even when it is rarely framed in those terms.
The wealth-concentration angle compounds across generations. Children of homeowners inherit, get help with down payments, and grow up in stable housing situations. Children of renters often grow up moving repeatedly, do not inherit, and start adult life without family help with housing. The compounding makes housing a major channel through which wealth and class persistence operate, in ways that affect outcomes far beyond just where someone lives. The wealth-and-inequality piece on this site discusses this dynamic in more depth.
How major cities and countries actually compare
The affordability picture varies sharply across countries and cities. The numbers below are rough estimates of price-to-income ratios in 2024-2025; they shift year to year.
The takeaway: housing affordability is not a function of any single variable. It is the result of interactions between zoning, geography, immigration, capital flows, tax policy, and political choices about who the housing market serves. The places that have stayed affordable - Tokyo, parts of the US Sunbelt, Vienna - have done so through specific deliberate choices that other places could in principle copy. The fact that they have not is itself a political fact worth examining.
The paths from here
Housing affordability is one of those problems that grinds on slowly until it reaches a breaking point. The political consequences are visible in nearly every major democracy. The structural choices below describe the realistic paths.
Continued slow worsening
Land-use rules stay restrictive. Population growth in attractive cities continues. Interest rates stabilise but housing prices stay high relative to income. Family formation continues to be delayed. The political pressure builds without producing decisive reform. The crisis becomes the new normal rather than getting solved.
Will it happen? This is the base case absent serious reform. The forces driving the affordability crisis are structural and have not weakened. Most political conversations about housing produce incremental changes that do not move the actual numbers much.
YIMBY-style reform succeeds in specific places
Some cities and states liberalise zoning meaningfully. Single-family-only zoning is replaced with allowance for duplexes, triplexes, and small apartment buildings. Permitting times are shortened. Environmental review requirements are streamlined for housing projects. Supply rises and prices stabilise or fall in those specific markets while rising elsewhere.
Will it happen? Already happening in some places. California, Oregon, Washington, parts of New England, parts of New Zealand, and parts of Australia have all passed reforms in this direction. The effects are real but modest so far. Whether the pattern spreads to the most-affected markets is the open question. The political coalition to make it happen is hard to build because the people who benefit from low housing prices (renters, young people) tend to participate in local politics less than the people who benefit from high housing prices (existing owners).
A housing crash provides a partial reset
A combination of higher interest rates, economic recession, demographic shift, and forced selling produces a sustained drop in housing prices in the most-stressed markets. Affordability improves as prices fall to incomes. Existing homeowners take losses; new buyers benefit. The political conflict between owners and renters becomes acute.
Will it happen? Possible in some markets, less likely as a global story. Past major housing crashes (US in 2008, Spain in 2011, Ireland in 2010) involved overbuilding, easy credit, and recession. The current set-up is more about under-supply than over-supply, which makes a 2008-style crash less likely. Localised corrections are more probable than the kind of global reset the Great Financial Crisis produced.
A major government building programme
One or more rich countries undertakes a Vienna-scale or postwar-Britain-scale public housing programme. Direct government building of new housing on government-owned land at non-market prices, with allocation by need, supplements market-rate construction. Prices stabilise in the affected markets and the political coalition behind the programme strengthens.
Will it happen? Politically difficult in most rich countries. The fiscal cost is real, the cultural memory of mid-century public housing failures (the British system after the 1970s, US housing projects) is unfavourable, and the local opposition to large new public housing developments is intense. Vienna remains the most successful current example; Singapore has its own version through HDB. Replicating either at scale in another country has not yet been seriously attempted.
Generational wealth transfer reshapes the picture
The largest intergenerational wealth transfer in history - estimated at $70-100 trillion in the US over the next two decades - flows partly into housing. Younger people inherit homes from parents and grandparents. The bottom of the housing market is partially propped up by these transfers. The structural unfairness of who can buy a home becomes increasingly visible: those whose families had homes can buy; those whose families did not, increasingly cannot.
Will it happen? Already partly happening. The "bank of mom and dad" funds a substantial share of first-home purchases in the UK, the US, Australia, and Canada. The class effect is significant: the gap between young adults with parental help and those without grows over time and through compounding home equity.
Migration patterns shift to affordable areas
Younger people priced out of expensive cities migrate to cheaper ones. Mid-sized cities (Austin, Nashville, Boise, Lyon, Manchester) grow at the expense of the largest metros. Some smaller towns experience renewal as remote-work-enabled migrants arrive. The geography of where economically productive work happens shifts somewhat.
Will it happen? Partly already happening. Austin, Phoenix, Tampa, and several other US cities grew substantially through 2024 from coastal migration. The pattern partially reversed when remote-work mandates relaxed and tech industry hiring contracted. The longer-term effects depend on how durable remote and hybrid work patterns turn out to be.
Tax and subsidy reform changes the picture
Mortgage interest deductions are capped or eliminated. Property tax breaks for owner-occupied housing are reduced. Capital gains exclusions on primary residences are tightened. Speculative real-estate investment is taxed more heavily. The structural advantages of housing as an investment vehicle are reduced; demand pressure eases.
Will it happen? Slowly and unevenly. The political constituency for mortgage and property tax breaks is broad - most homeowners benefit and most homeowners vote. Reform tends to come at the margins (the 2017 US tax law lowered the mortgage interest deduction cap; some Canadian provinces have introduced foreign-buyer taxes). Comprehensive reform has not been politically possible in most rich countries.
The realistic forecast is, again, a mix. The base case is path 1 - continued slow worsening with localised reforms that nibble at the edges. Path 2 (YIMBY reform) is gaining ground in specific places. Paths 3-7 are real but less central. Housing remains one of the central political and economic issues of the period, with no clean solution in sight and large generational consequences accumulating.
Where serious analysts disagree
Housing is one of those topics where careful researchers using similar data reach different conclusions about what to do. Each reading below is held by named scholars worth engaging directly.
Supply is the central problem and zoning reform is the central answer
The housing-affordability crisis is, at its core, a supply problem. In the most-stressed markets, restrictive zoning, lengthy environmental review, neighbourhood opposition, and political fragmentation between many small jurisdictions have made it nearly impossible to build housing at the scale demand requires. Liberalising zoning, streamlining permitting, and overcoming local opposition is the highest-leverage policy intervention available. Other reforms (rent control, subsidy programmes, tax changes) help at the margins; supply reform is structural.
Held by: Edward Glaeser (Harvard), Jenny Schuetz (Brookings), and most of the housing economics profession across the political spectrum. Their data on the relationship between zoning restrictiveness and housing prices is robust. The political case for action faces real opposition from existing homeowners.
Investor and speculative demand is more central than supply
The supply story is partly a distraction from the more direct cause: housing has become an investment asset rather than just a consumption good. Foreign capital, professional landlords, large-scale single-family-rental investors, and short-term rental platforms have added demand pressure that supply reform alone cannot offset. Direct interventions on speculative demand (foreign-buyer taxes, restrictions on bulk single-family-rental purchases, vacancy taxes) are needed alongside any supply-side reforms.
Held by: parts of the progressive housing-policy community, some Canadian and Australian researchers responding to specific local conditions. The data on the magnitude of investor demand effects is contested; the data on its existence is real. Most careful housing economists treat this as a real factor that adds to but does not replace the supply story.
Rent control creates more problems than it solves
The empirical record on strict rent control across multiple countries is consistent: short-term benefits to existing tenants, longer-term reductions in housing supply, deterioration of quality, increased difficulty for new entrants to find housing, and unequal outcomes that benefit better-connected residents over the most vulnerable. The 2019 Diamond, McQuade, and Qian study on San Francisco confirmed and refined this picture. Most professional economists across the political spectrum reach this conclusion despite the political popularity of rent control.
Held by: Rebecca Diamond (Stanford), Tim McQuade (Berkeley), Franklin Qian (now USC), Edward Glaeser, and most working housing economists. The Berlin rent-cap experiment of 2020-2021 (struck down by courts but illustrative) reinforced their case. The political conversation has been slower to update than the academic consensus.
The home-as-investment model is the original distortion
Treating housing as both a place to live and an investment asset that should appreciate over time creates an inherent contradiction. If housing prices rise faster than incomes, the next generation cannot afford it. If housing prices fall, current homeowners are politically devastated. The system as designed produces the affordability crisis as a feature, not a bug. Resolving it requires reframing housing as primarily consumption, with policy that does not subsidise owner-occupiers as investors.
Held by: the Henry George tradition, parts of the modern monetary theory school (Stephanie Kelton and others), and a strand of structural housing-policy thinking. The argument is theoretically clean and politically very difficult; making homeowners worse off as a class has not been a politically successful program in any rich country.
Successful examples exist and could be copied
Tokyo demonstrates that a major global city can stay affordable through permissive national zoning. Vienna demonstrates that a major Western city can stay affordable through large-scale public housing. Singapore demonstrates that an entire small country can manage housing through the Housing Development Board model. Each is replicable in principle; the political will to do so has been the binding constraint, not the technical feasibility.
Held by: Alain Bertaud (NYU, focusing on the Tokyo model), Andreas Bergh (focusing on Nordic public-housing approaches), and a small body of comparative urban economics. The argument is that the housing crisis is more solvable than is usually presented; what is missing is the political coalition to actually solve it.
None of these readings is fully right or wrong. What can be said from the available evidence: supply is the central long-run problem; investor demand and speculative dynamics add to it; rent control mostly fails; the home-as-investment model creates structural contradictions; and successful examples exist but require political will most countries have not yet generated. The practical implication is that a comprehensive housing reform requires liberalising supply, addressing speculative demand, avoiding rent-control mistakes, and building the political coalition for major change. Few countries are doing all of these simultaneously.
What this means for you
Housing touches every reader's life directly. A few practical observations:
If you are renting and want to buy
The math is harder than it was for previous generations. Down-payment requirements have grown faster than wages. The hardest decision is often whether to compromise on location to enter the market at all (which often makes financial sense) versus waiting for the market to become more accessible in your preferred area (which historically has not happened on the timescale most people want). The single highest-leverage variable for whether you can afford a home in a stressed market is whether your family has wealth to help with a down payment - not a comfortable observation, but a true one.
If you own a home
Your home is probably your largest single asset. The price-rise of the last 20 years has been a structural windfall to your generation. The political conversations about housing affordability in your country are partly a conversation about whether to reduce that windfall for the benefit of younger and less wealthy households. How you engage in that conversation - whether you support reforms that may reduce your home's appreciation in exchange for broader access, or oppose them to preserve your specific equity - is a meaningful civic choice that more people should think about deliberately.
If you are choosing where to live
The cost of housing has become one of the most important variables in life-planning decisions. A more affordable region with a moderately worse job typically delivers a better life than an expensive region with a moderately better job, because the housing-cost premium absorbs more value than most people realise. Mid-sized cities with strong economies (Austin, Nashville, Raleigh, Lyon, Manchester) have become a sweet spot for many. The trade-offs are real and worth thinking about explicitly rather than defaulting to the most prestigious city option.
If you are voting on local issues
Most housing policy is local: zoning decisions, building permits, transit investment, tax assessments. The local councils, planning commissions, and ballot measures that affect housing are typically decided by small numbers of engaged voters - and the engaged voters tend to be older homeowners. Younger and renter voters who actually show up to local hearings and elections have outsized influence. Voting on the merits of specific zoning reform, transit investment, and housing-policy proposals is one of the highest-leverage civic activities available.
If you are thinking about your children's future
The housing-affordability gap is one of the largest single drivers of generational inequality. Help with a down payment is one of the highest-leverage transfers parents can make to adult children, far more impactful than smaller cash gifts spread over years. If you are in a position to help, doing so deliberately and early often produces better outcomes than waiting until inheritance. If you are not in that position, encouraging your children to consider less expensive regions early in their careers is one of the most useful pieces of life advice available.
The mechanics behind this
The housing story sits on top of three deeper mechanisms covered elsewhere on this site. If the analysis above depends on ideas you want to understand first, these fundamentals make the conversation more legible:
