The Housing Affordability Crisis: How Shelter Became the Engine of Social Stratification

In the mid-20th century, housing policy in most Western democracies was oriented toward expanding homeownership as a foundation for middle-class stability. Public housing, mortgage subsidies, and zoning regulations were tools for building an ownership society. That project has reversed. Across the OECD, homeownership rates among younger cohorts are declining, housing costs as a share of income are rising, and the gap between property owners and renters has become one of the defining axes of social inequality.

The numbers are stark. In England, the average home costs approximately 7.7 times the average annual income (ONS 2024)—up from 3.6 times in 1997. In Seoul, official measures place the ratio around 12-14 (with some estimates even higher when accounting for actual purchasing conditions). In San Francisco, a household needs to earn over $300,000 annually to afford a median-priced home (Zillow/Clever estimates, 2024). These are not temporary market fluctuations. They reflect structural changes in housing markets—financialization of residential property, restrictive zoning, underinvestment in public and social housing, and the treatment of shelter as an asset class rather than a basic need.

Why It Matters

Litvintsev (2025) reviews Ricardo Tranjan's "The Tenant Class" (2023) and extends its analysis of housing inequality as class formation. The review situates the contemporary housing crisis within a longer tradition of housing class theory, arguing that the divide between property owners and permanent renters is creating a new axis of class stratification that operates alongside—and increasingly supersedes—traditional income-based class divisions. Homeowners accumulate wealth through property appreciation and leverage housing equity for further investment. Renters transfer wealth to property owners through rent payments that build no equity, creating a self-reinforcing cycle of divergence.

This is not merely an economic argument. Housing determines neighborhood quality, school access, social networks, health outcomes, political power, and intergenerational wealth transfer. When housing becomes the primary mechanism of wealth accumulation—and when access to ownership is increasingly determined by parental wealth rather than individual earnings—housing markets become engines of hereditary stratification, undermining the meritocratic assumptions that legitimate market economies.

The Science

Displacement and Health

Silva, Carvalheiro, and Torres (2025) examine the health impacts of direct displacement in Porto, Portugal—a city experiencing what the authors call "transnational gentrification" driven by international tourism, digital nomad immigration, and foreign real estate investment. Their ethnographic research documents how low-income, long-term residents are displaced from neighborhoods they have inhabited for decades as housing costs rise beyond their means.

The health findings are striking: displaced residents report significantly higher rates of anxiety, depression, sleep disturbance, and chronic stress compared to non-displaced residents of similar socioeconomic status. The health impacts are not explained by the housing change alone—they reflect the destruction of social networks, the loss of familiar environments, and the psychological trauma of involuntary displacement from places of belonging. Displacement severs the community ties that buffer health against socioeconomic adversity, removing a protective factor precisely when it is most needed.

Post-Colonial Urban Stratification

Maseko (2025) examines displacement in Durban's Point Precinct, South Africa, where waterfront redevelopment has transformed a working-class neighborhood into an upscale commercial and residential zone. Drawing on ethnographic research with 50 residents and 4 municipal officials, the study documents how post-apartheid housing rights—enshrined in South Africa's constitution—collide with market-driven development. Residents invoke the constitutional right to housing; developers invoke property rights and economic development. The state mediates this conflict inconsistently, generally favoring development interests while providing inadequate relocation assistance.

The South African case reveals how housing crises in the Global South reproduce colonial spatial patterns under market logic. Neighborhoods designed to house Black workers during apartheid are now valued by developers for their proximity to economic centers. The displacement of current residents reconstitutes racial and class segregation through market mechanisms rather than legal mandate—producing similar spatial outcomes with different ideological justification.

Public Housing and Integration

Montgomery (2024) examines the legacy and potential of public housing in addressing urban social and spatial stratification in New York City. The analysis reveals that American public housing has historically reinforced stratification by concentrating low-income residents in isolated developments with inadequate funding and maintenance. However, Montgomery tests the potential for public housing to serve as a tool for integration rather than isolation—through mixed-income development, improved design that connects housing to surrounding neighborhoods, and sustained maintenance investment.

The study identifies a fundamental tension: public housing that successfully integrates residents into surrounding communities raises neighborhood property values, potentially triggering the gentrification dynamics that displace the very populations public housing was intended to serve. Achieving integration without displacement requires sustained policy commitment and design innovation that few political environments can sustain.

The Tenant Class

Litvintsev (2025) traces the theoretical lineage from Rex and Moore's 1967 housing class theory to Tranjan's contemporary analysis. The evolution reveals that housing stratification has intensified, not diminished, over six decades. In the 1960s, housing class primarily reflected discrimination in access to homeownership. In the 2020s, housing class reflects a structural transformation of the entire housing market: the financialization of residential property has converted housing from a consumption good (shelter) into an investment vehicle, creating systematic incentives for restriction of supply and escalation of costs.

The "tenant class" framework argues that renters and owners now constitute distinct classes with opposing material interests: owners benefit from housing scarcity and price appreciation; renters suffer from it. This class conflict is obscured by the ideology of homeownership aspiration—renters are framed as future owners temporarily in transition, rather than as a permanent class with distinct interests requiring collective organization and political representation.

Housing Affordability: Global Comparison

What To Watch

The housing affordability crisis is generating political responses across the ideological spectrum—from YIMBY (Yes In My Back Yard) movements advocating zoning reform to increase supply, to tenant organizing movements demanding rent control and social housing investment, to proposals for land value taxes that would reduce the profitability of holding property as a speculative asset. Watch for three critical tests: (1) whether zoning reform in high-cost cities (California, New Zealand, the UK) actually produces sufficient affordable housing or primarily benefits market-rate development; (2) whether the emerging tenant class consciousness translates into durable political organization comparable to the labor movement; and (3) whether the growing intergenerational housing wealth gap becomes a mobilizing political issue that forces structural reform—or whether it simply entrenches a new form of hereditary stratification accepted as the natural order.

In the mid-20th century, housing policy in most Western democracies was oriented toward expanding homeownership as a foundation for middle-class stability. Public housing, mortgage subsidies, and zoning regulations were tools for building an ownership society. That project has reversed. Across the OECD, homeownership rates among younger cohorts are declining, housing costs as a share of income are rising, and the gap between property owners and renters has become one of the defining axes of social inequality.

The numbers are stark. In England, the average home costs approximately 7.7 times the average annual income (ONS 2024)—up from 3.6 times in 1997. In Seoul, official measures place the ratio around 12-14 (with some estimates even higher when accounting for actual purchasing conditions). In San Francisco, a household needs to earn over $300,000 annually to afford a median-priced home (Zillow/Clever estimates, 2024). These are not temporary market fluctuations. They reflect structural changes in housing markets—financialization of residential property, restrictive zoning, underinvestment in public and social housing, and the treatment of shelter as an asset class rather than a basic need.

Why It Matters

Litvintsev (2025) reviews Ricardo Tranjan's "The Tenant Class" (2023) and extends its analysis of housing inequality as class formation. The review situates the contemporary housing crisis within a longer tradition of housing class theory, arguing that the divide between property owners and permanent renters is creating a new axis of class stratification that operates alongside—and increasingly supersedes—traditional income-based class divisions. Homeowners accumulate wealth through property appreciation and leverage housing equity for further investment. Renters transfer wealth to property owners through rent payments that build no equity, creating a self-reinforcing cycle of divergence.

This is not merely an economic argument. Housing determines neighborhood quality, school access, social networks, health outcomes, political power, and intergenerational wealth transfer. When housing becomes the primary mechanism of wealth accumulation—and when access to ownership is increasingly determined by parental wealth rather than individual earnings—housing markets become engines of hereditary stratification, undermining the meritocratic assumptions that legitimate market economies.

The Science

Displacement and Health

Silva, Carvalheiro, and Torres (2025) examine the health impacts of direct displacement in Porto, Portugal—a city experiencing what the authors call "transnational gentrification" driven by international tourism, digital nomad immigration, and foreign real estate investment. Their ethnographic research documents how low-income, long-term residents are displaced from neighborhoods they have inhabited for decades as housing costs rise beyond their means.

The health findings are striking: displaced residents report significantly higher rates of anxiety, depression, sleep disturbance, and chronic stress compared to non-displaced residents of similar socioeconomic status. The health impacts are not explained by the housing change alone—they reflect the destruction of social networks, the loss of familiar environments, and the psychological trauma of involuntary displacement from places of belonging. Displacement severs the community ties that buffer health against socioeconomic adversity, removing a protective factor precisely when it is most needed.

Post-Colonial Urban Stratification

Maseko (2025) examines displacement in Durban's Point Precinct, South Africa, where waterfront redevelopment has transformed a working-class neighborhood into an upscale commercial and residential zone. Drawing on ethnographic research with 50 residents and 4 municipal officials, the study documents how post-apartheid housing rights—enshrined in South Africa's constitution—collide with market-driven development. Residents invoke the constitutional right to housing; developers invoke property rights and economic development. The state mediates this conflict inconsistently, generally favoring development interests while providing inadequate relocation assistance.

The South African case reveals how housing crises in the Global South reproduce colonial spatial patterns under market logic. Neighborhoods designed to house Black workers during apartheid are now valued by developers for their proximity to economic centers. The displacement of current residents reconstitutes racial and class segregation through market mechanisms rather than legal mandate—producing similar spatial outcomes with different ideological justification.

Public Housing and Integration

Montgomery (2024) examines the legacy and potential of public housing in addressing urban social and spatial stratification in New York City. The analysis reveals that American public housing has historically reinforced stratification by concentrating low-income residents in isolated developments with inadequate funding and maintenance. However, Montgomery tests the potential for public housing to serve as a tool for integration rather than isolation—through mixed-income development, improved design that connects housing to surrounding neighborhoods, and sustained maintenance investment.

The study identifies a fundamental tension: public housing that successfully integrates residents into surrounding communities raises neighborhood property values, potentially triggering the gentrification dynamics that displace the very populations public housing was intended to serve. Achieving integration without displacement requires sustained policy commitment and design innovation that few political environments can sustain.

The Tenant Class

Litvintsev (2025) traces the theoretical lineage from Rex and Moore's 1967 housing class theory to Tranjan's contemporary analysis. The evolution reveals that housing stratification has intensified, not diminished, over six decades. In the 1960s, housing class primarily reflected discrimination in access to homeownership. In the 2020s, housing class reflects a structural transformation of the entire housing market: the financialization of residential property has converted housing from a consumption good (shelter) into an investment vehicle, creating systematic incentives for restriction of supply and escalation of costs.

The "tenant class" framework argues that renters and owners now constitute distinct classes with opposing material interests: owners benefit from housing scarcity and price appreciation; renters suffer from it. This class conflict is obscured by the ideology of homeownership aspiration—renters are framed as future owners temporarily in transition, rather than as a permanent class with distinct interests requiring collective organization and political representation.

Housing Affordability: Global Comparison

| Porto, Portugal | ~15x (Numbeo 2024) | Declining | Tourism gentrification, short-term rentals | Airbnb restrictions, rent freezes | | Durban, South Africa | N/A (informal sector) | High (informal) | Post-apartheid redevelopment, displacement | Constitutional right to housing (unevenly enforced) | | Tokyo, Japan | ~13x | ~40% | Relatively better due to permissive zoning | Minimal zoning restrictions, high housing supply |

What To Watch

The housing affordability crisis is generating political responses across the ideological spectrum—from YIMBY (Yes In My Back Yard) movements advocating zoning reform to increase supply, to tenant organizing movements demanding rent control and social housing investment, to proposals for land value taxes that would reduce the profitability of holding property as a speculative asset. Watch for three critical tests: (1) whether zoning reform in high-cost cities (California, New Zealand, the UK) actually produces sufficient affordable housing or primarily benefits market-rate development; (2) whether the emerging tenant class consciousness translates into durable political organization comparable to the labor movement; and (3) whether the growing intergenerational housing wealth gap becomes a mobilizing political issue that forces structural reform—or whether it simply entrenches a new form of hereditary stratification accepted as the natural order.