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R. Philippa

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An iteration on the implementation of the sustainable strategy within development projects in the dense urban environment

Master thesis (2026) - R. Philippa, G. Calabretta, E.B. Mazerant
This research investigates the implementation of corporate sustainability strategies at Heijmans Real Estate, a leading Dutch developer navigating the pressures of a national housing shortage, stringent environmental legislation, and a shrinking workforce. Despite high-level strategic ambitions, the research identifies a persistent gap where financial targets and traditional routines
frequently reduce sustainability to a secondary priority at the project level.

To diagnose this friction, a qualitative, practice-based methodology was employed, encompassing eight preliminary interviews, observation of meetings, and a multi-case study analysis of three urban development projects. Through document analysis and semi-structured interviews with project developers, the research deconstructed decision-making processes using the theoretical lenses of the Cynefin framework, Organisational Ambidexterity, and Double-Loop Learning.

The findings reveal that project developers resist sustainability out of professional self-preservation. Faced with the complicated, high-pressure reality of urban development, a lack of psychological safety and financial headroom causes developers to revert to known, cost-driven routines to safeguard margins, a classic manifestation of single-loop learning. Furthermore, systemic silos between the sustainability team and developers result in uncontextualised advice and targets that are experienced as vague, which actively hinder innovation.

To bridge this disconnect, the research applies Kees Dorst’s studio model to design a collaborative innovation infrastructure: the Ontwikkelplaats. Developed through iterative ideation and tailored to the pragmatic, results-driven culture of the regional office, this intervention embeds a continuous learning rhythm of experimenting, learning, communicating, and growing into daily operations. By formalising financial safety through structurally lowered return-on-investment boundaries, capturing field reality via Veldmemos, and cultivating psychological safety through bi-annual partner sprints and zero-preparation think tanks, the design systematically removes the cognitive and financial barriers to change. Validated by both developers and sustainability advisors, the Ontwikkelplaats proposes to successfully facilitate the transition from an exploitation to an exploration mindset. It shifts the organisation towards collective double-loop learning, ensuring sustainability becomes an integrated element of the developer’s professional craftsmanship and enabling the organisation’s systemic vitality. ...