There is much ado about urban housing affordability globally, yet little clarity about what it actually means or agreement on how to promote it. Accordingly, this study sets out to explore the ambiguities and complexities surrounding it. Taking Finland as an empirical case, the study asks: how to conceptualise urban housing affordability as a policy problem? The study focuses on three areas in this question: (1) operationalisation (definitions and measurement), (2) policy to promote affordability, and (3) local variations in both. The study frames affordability as a vexed question, as it is marked by persistent disputes, complexity and difficulty in dealing with it.

The study situates urban housing affordability at the intersection of housing studies, poverty research, welfare state studies, and urban studies. It draws on housing studies to highlight the distinctness of housing as a basic need, consumption item, and policy issue. Questions of defining and measuring affordability intersect with poverty research, which also informs framing affordability primarily in relation to adequate household consumption and considerations of societally acceptable living standards. The welfare state studies, in turn, intertwine with promoting affordability and housing policy. Finally, urban studies draw attention to the spatial dimensions of housing and how the question is particularly prevalent in urban areas. Specifically, the study argues that local variations emerge as a unique aspect of housing affordability that many fields of study have overlooked. Given its focus on poverty, the welfare state, and local-level dynamics, the study primarily conceptualises housing affordability as a matter of basic need and adequate consumption, rather than from the perspective of asset accumulation.

The study consists of three peer-reviewed research articles. Article I examines how housing affordability is defined in Finnish housing policy and illustrates contradictions arising from ambiguous definitions. Article II compares local differences in affordability among low-wage private rental sector (PRS) tenants across 11 cities. It applies the Model Family Method (MFM) to address gaps in locallevel data. Article III analyses how three large cities (Helsinki, Tampere and Turku) vary in their strategies to promote affordability and their capacity to actively steer the local housing market.

Employing a mixed-methods approach, the study uses content analysis (Articles I and III) and the MFM (Article II). The qualitative data include policy documents 4 (legislation, guidelines and strategies related to housing policy); expert interviews (N=22) with key actors in the preparation, development and implementation of housing policy; and a reference budget report. The statistical data cover housing construction data, rents, housing, wages and social benefits. The analysis focuses on the years 2018–2019. The empirical analysis covers 11 cities, but focuses particularly on Helsinki, Tampere and Turku. National-level policies are also explored.

The main findings are as follows. First, the study revealed ambiguities in how affordability is operationalised, that is, defined and measured in Finland. Three key approaches to defining affordability were explored: normative definitions, consumer choice and tenure-based definitions. While Finnish housing policy acknowledges the normative approach—linking household incomes, housing costs and quality—it lacks clear indicators. In practice, affordability is often defined through the consumer choice approach as indicated by the emphasis on housing market efficiency or equated with supply-side measures, such as social rental housing, which is frequently described as ‘affordable’. Subsequently, monitoring focuses on housing construction and the housing market rather than housing costs versus income. The analysis also revealed inconsistencies in definitions across governance levels.

Second, the MFM was shown to be a promising method to compare local-level affordability in the absence of suitable survey data. The empirical comparison from 2019 confirmed that low-wage PRS tenants face heightened unaffordability risks in the Helsinki Metropolitan Area, particularly among single-person and single-parent households, but that moderate rent overburdens were frequent in many other cities as well. While housing-induced poverty was not observed, the results showed that the remaining income after housing costs was often too low to manage unexpected financial pressures.

Third, the policy analysis showed that Finland emphasises supporting an increase in housing supply through private developers and housing market efficiency as the main options to promote affordability, indicating a market-oriented approach. While supply-side policies continue to play an important role, low-income households’ affordability is mainly supported by demand-side subsidies. Nationally, housing governance is fragmented across different ministries, and the study argues that affordability is an in-between policy goal without clear integration.

Fourth, the local-level policy analysis highlights variation in municipalities’ roles to promote affordability. Despite similar and relatively extensive powers over land use, large cities like Helsinki, Tampere, and Turku differed in how actively the cities steered the local housing market. For example, Helsinki promoted a higher share of regulated housing than the Finnish average, while Turku assumed a less active role. Municipal administrative capacity and competencies were identified among the decisive factors shaping the differences, but also regional competition and collaboration among neighbouring municipalities may have an impact.

In conclusion, although urban housing affordability remains a vexed policy issue, clearer conceptualisation may reduce ambiguity and shed light on political divisions that are often implicit. This study shows that different conceptualisations of affordability are currently applied inconsistently, highlighting the need for greater definitional precision in research and policy.

The study proposes adopting an explicit, normative framework for affordability that focuses on housing outcomes and links the issue to poverty and income adequacy. This framework bridges housing policy, poverty alleviation, and welfare state policies better than others. However, the conceptualisation should also consider the distinctiveness of housing, particularly its location-specificity, and the variation of the housing question across municipalities and neighbourhoods. The study therefore calls for more frequent local comparisons within countries. Here, the application of the MFM serves as a valuable methodological contribution. The study criticises the dominant consumer choice and market-oriented approaches for overlooking housing as a political question and its particularities as a basic need. Finally, it cautions against overemphasising affordability as a policy goal. Positioning affordability within broader concepts, such as housing needs or justice, could more effectively capture the multiple dimensions of housing inequalities of the 2020s and help ensure housing for all.