For a housing debate that seeks land where it is needed. A commentary on the InWIS study “Housing Construction needs (more) land” Authors Sebastian Eichhorn ILS – Institut für Landes- und Stadtentwicklungsforschung; Leibniz-Institut für ökologische Raumentwicklung https://orcid.org/0000-0003-3825-0614 Christian Holl frei04 publizistik Mathias Jehling Leibniz-Institut für ökologische Raumentwicklung https://orcid.org/0000-0002-7498-3607 Angelika Münter ILS – Institut für Landes- und Stadtentwicklungsforschung https://orcid.org/0000-0001-6624-1008 Ricarda Pätzold Deutsches Institut für Urbanistik Thomas Preuß Deutsches Institut für Urbanistik Maic Verbücheln Deutsches Institut für Urbanistik DOI: https://doi.org/10.14512/rur.3425 Keywords: Housing construction, Land-saving targets, Urban development, Small-scale analysis Abstract This commentary addresses the findings of the study “Housing Construction Needs (More) Land: New Land Take and Infill Development Under Scrutiny”, published by Institute for Housing, Real Estate, Urban and Regional Development (InWIS) at the Ruhr University Bochum und der EBZ Business School Bochum on June 18, 2025. The study concludes that due to barriers to infill development, new land is required for housing construction, and that the 30-hectare land-saving target should be questioned. In our view, this blanket demand is misleading and steers the debate in the wrong direction. Our micro-level empirical evidence shows that housing demand is highly concentrated in growth centres and transport corridors, while other areas are stagnating. A blanket release of land would therefore fuel uncontrolled urban sprawl. Instead of short-sighted instruments, we call for a sustainable housing policy based on a valid, small-scale database. The challenges are local, but the solutions must be conceived regionally and organized cooperatively. We advocate for a planning culture that strengthens regional responsibility and manages development according to actual needs, instead of abandoning land conservation across the board. Downloads Download data is not yet available. References Bauer, U.; Gies, J.; Hoch, A.; Hollbach-Grömig, B.; Kühl, C.; Pätzold, R.; Scheller, H.; Schneider, S. (2021): Das Umland der Städte. Chancen zur Entlastung überforderter Wohnungsmärkte. Plausibilitäten – Determinanten – Restriktionen. Berlin. Blum, A.; Atci, M. M.; Roscher, J.; Henger, R.; Schuster, F. (2022): Bauland- und Innenentwicklungspotenziale in deutschen Städten und Gemeinden. Bonn. = BBSR-Online-Publikation 11/2022. Bölting, T.; Dylewski, C.; Höbel, R. (2025): Wohnungsbau braucht (mehr) Fläche. Flächenneuinanspruchnahme und Innenentwicklung auf dem Prüfstand. Bochum. = InWIS-Berichte 37. Bovet, J.; Reese, M.; Köck, W. (2018): Taming expansive land use dynamics – Sustainable land use regulation and urban sprawl in a comparative perspective. In: Land Use Policy 77, 837–845. https://doi.org/10.1016/j.landusepol.2017.03.024 Eichhorn, S.; Ehrhardt, D.; Münter, A.; Behnisch, M.; Jehling, M. (2024): Understanding land take by low-density residential areas: An institutionalist perspective on local planning authorities, developers and households. In: Land Use Policy 143, 107198. https://doi.org/10.1016/j.landusepol.2024.107198 Ehrhardt, D.; Eichhorn, S.; Behnisch, M.; Jehling, M.; Münter, A.; Schünemann, C.; Siedentop, S. (2022): Stadtregionen im Spannungsfeld zwischen Wohnungsfrage und Flächensparen. Trends, Strategien und Lösungsansätze in Kernstädten und ihrem Umland. In: Raumforschung und Raumordnung | Spatial Research and Planning 80, 5, 522–541. https://doi.org/10.14512/rur.216 Ehrhardt, D.; Sommer, F.; Ndim, M.; Raimbault, J.; Hartmann, T.; Jehling, M. (2025): Who drives urban densification? Linking landownership and spatial dynamics. In: Raumforschung und Raumordnung | Spatial Research and Planning 83, 4, 285–301. https://doi.org/10.14512/rur.2977 Henger, R.; Voigtländer, M. (2019): Ist der Wohnungsbau auf dem richtigen Weg? Aktuelle Ergebnisse des IW-Wohnungsbaubedarfsmodells. Köln. = IW-Report 26/19. Jehling, M.; Schorcht, M.; Hartmann, T. (2020): Densification in suburban Germany. Approaching policy and space through concepts of justice. In: Town Planning Review 91, 3, 217–237. https://doi.org/10.3828/tpr.2020.13 Downloads PDF (German) HTML (German) XML (German) Published Issue publication date 2025-10-30 (version 2)Published online first 2025-09-25 (version 1) Versions 2025-10-30 (2) 2025-09-25 (1) Issue Vol. 83 No. 5 (2025) Section Commentary License Copyright (c) 2025 Sebastian Eichhorn, Christian Holl, Mathias Jehling, Angelika Münter, Ricarda Pätzold, Thomas Preuß, Maic Verbücheln This work is licensed under a Creative Commons Attribution 4.0 International License. Articles in Raumforschung und Raumordnung – Spatial Research and Planning are published under a Creative Commons license. From Vol. 79 No. 2 (2021), the license applied is CC BY 4.0. From Vol. 77 No. 1 to Vol. 79 No.1, articles were published under a CC BY-SA license. Earlier volumes have been re-published by oekom 2022 under the Creative Commons Attribution 4.0 International License CC BY 4.0. How to Cite 1.Eichhorn S, Holl C, Jehling M, Münter A, Pätzold R, Preuß T, et al. For a housing debate that seeks land where it is needed. A commentary on the InWIS study “Housing Construction needs (more) land”. RuR [Internet]. 2025 Oct. 30 [cited 2026 Jan. 19];83(5):345-9. Available from: https://rur.oekom.de/index.php/rur/article/view/3425 More Citation Formats ACM ACS APA ABNT Chicago Harvard IEEE MLA Turabian Vancouver Download Citation Endnote/Zotero/Mendeley (RIS) BibTeX Share Funding data Umweltbundesamt Grant numbers 3723151050
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