Contemporary Iranian architecture has undergone inevitable transformation—driven by factors such as the shift from traditional to modern construction methods—moving from a state of traditional introversion toward modernist extroversion. A crucial component of modern buildings is the primary façade; visible from streets and thoroughfares, these façades shape the physical character of the urban landscape. Understanding the factors that influence the creation of urban façades requires careful identification and analysis. As long as studies on urban identity focus primarily on landmark buildings while overlooking residential façades—which constitute the vast majority of a city's built environment—research findings will lack comprehensiveness and fail to adequately reflect the pluralism inherent in urban façade design. This study aims to provide a historical analysis of the evolution and transformation of mid-rise building façades, as well as the factors influencing this trajectory from the 1960s to the 2020s. Ultimately, this research seeks to foster an analytical understanding of the historical trends in urban façade design, thereby raising awareness and clarifying appropriate approaches for the future.
The research methodology combines a descriptive-historical approach for the theoretical framework with the Delphi method—utilizing expert opinions—to identify influential indicators and establish a basis for analysis. This study examines a sample of 80 mid-rise residential buildings constructed between the 1960s and the 2020s. Following the identification of influential factors based on the perspectives of contemporary architectural scholars, an expert survey was conducted. Ultimately, by outlining the historical evolution of mid-rise building facades, the study demonstrates that considering economic, cultural, political, and regulatory indicators can significantly influence urban management at a societal scale; furthermore, it highlights the necessity of addressing specific needs—such as fostering creative processes in architectural education, continuously updating facade design regulations, prioritizing pluralistic elements and physical details, and ensuring consistency in specialized decision-making systems.

Urban facades represent one of the most critical issues in architecture and urban management in Iran—a phenomenon less frequently observed in European or American contexts. Although theorists and experts have identified an "identity crisis" regarding the facades of buildings in Tehran, a significant gap remains between the current reality and the desired standard. The facade holds particular importance, both in terms of its subject matter and the breadth of its audience. This significance is further amplified by the profound impact that urban facades exert on the physical fabric and visual character of cities. The collective facades of a city’s buildings function much like individual words; when arranged together—forming sentences, paragraphs, and ultimately a cohesive text—they acquire character and identity, necessitating a meaningful relationship among one another. Despite this, the disarray of urban frontages in Iran has emerged as a serious challenge in the contemporary era.
Regardless of how extensively urban facades are examined as "products" within academic circles, such discussions will lack real impact unless the factors influencing the creation of these facades are identified and clearly defined. Furthermore, contemporary research on urban identity has largely focused on prominent, landmark facades. While such landmarks certainly contribute to a city's identity, the role of residential facades—which account for the largest share of urban land use—is arguably even more significant. This research addresses the core identity-related challenges encountered during the design of residential facades in Tehran between the 1960s and the 2020s—a period spanning both the Pahlavi era and the Islamic Republic—viewing these structures as part of Tehran’s contemporary architectural heritage. To analyze this, the study identifies the key factors and stakeholders that have shaped these facades. A proper understanding of this process requires an analysis of the various groups, contextual elements, and intervening forces at play. If the specific impact of each of these factors is accurately understood—and if responsible institutions develop targeted plans for each—the gap between theory and practice will narrow significantly, offering a promising path toward strengthening the identity of Tehran’s urban landscape.
Despite numerous studies, the issue of urban facades has received relatively little attention. Existing research has rarely employed scientific approaches—which are crucial for evaluating contemporary Iranian architecture, particularly that of the post-Islamic Revolution era. Consequently, while the literature on contemporary architecture offers detailed and reliable analyses of works from the First Pahlavi period and the early stages of the Second Pahlavi era, such comprehensive, cohesive analysis becomes less prevalent when the focus shifts to the contemporary period. Thus, the necessity of addressing this subject within the history of contemporary Iranian architecture is self-evident, requiring no extensive or elaborate justification.
Organizing the physical, cultural, and economic systems—as well as the policy frameworks—governing building facades, particularly for mid-rise structures (4 to 7 residential stories), while accounting for their historical evolution over recent decades, can strengthen and elevate this building typology—the most prevalent form of urban architecture—thereby establishing a sound foundation for future design interventions within the urban fabric.
Historical-interpretive research is a process of gathering and interpreting data concerning past events to gain a better understanding of current events. In this approach, the researcher examines the potential causes of specific past events in order to explain their influence on subsequent occurrences. This method is particularly useful for addressing historical phenomena that have been shaped by the passage of time; it allows for a review of the relevant literature and theoretical foundations, while also identifying two primary strategies—critical and descriptive—for engaging with contemporary architecture. The objective of historical research is to reconstruct the past within the framework of a hypothesis formulated in the present.
Accordingly, this research adopts an interpretive paradigm and a qualitative approach, utilizing an inductive logic of inquiry—moving from specific case examples toward theory generation. The research methodology integrates content analysis (for the theoretical framework), surveys (for field studies), and the Delphi method (expert consultation) to analyze perspectives and outcomes across 10-year intervals spanning from the 1960s to the 2020s. Ultimately, the study aims to elucidate the evolutionary trajectory of residential facades in contemporary Iranian architecture and, by presenting a conceptual model, offer a framework for understanding the factors that influence the design of such buildings.
The facades of contemporary residential buildings in Iran are the product of a pluralistic environment that has emerged in the wake of social, cultural, economic, political, and technological transformations. While this pluralism has facilitated the emergence of diversity, novel experiences, and an expansion of architectural possibilities, the absence of a coherent conceptual and identity-based framework has resulted in physical fragmentation, a rupture in meaning, and a weakening of the connection between architecture and its cultural context. Consequently, the central challenge facing contemporary Iranian architecture is not the existence of plurality and diversity itself, but rather the lack of a mechanism to transform this plurality into a form of diversity that is meaningful, context-sensitive, and rooted in identity.
At the same time, the growing importance of economic considerations and construction costs will exert a greater influence than ever before on the selection of materials and facade-construction methods. Furthermore, legal requirements and building codes—by establishing a clear framework for quality control, safety, and the coordination of facades—can play a decisive role in bringing order to the existing diversity within the urban landscape. Consequently, the future of facade design cannot be examined independently of the regulatory framework and the economic structure of housing production.
On the other hand, the necessity of reducing energy consumption, adapting to climatic conditions, and addressing the environmental impacts of construction—through the use of sustainable, durable, and recyclable materials, as well as the selection of climate-appropriate technologies—will become a fundamental component of future design. This trend reflects a gradual shift in the perception of the façade: moving from a purely visual surface to a functional, environmentally responsive "skin" that must simultaneously address aesthetic, cultural, and technical requirements.
Accordingly, the future of facade design for residential buildings in Iran lies neither in eliminating pluralism and reverting to a single architectural language, nor in the passive adoption of global models and fleeting trends; rather, it resides in the conscious management of this diversity by striking a balance among three realms: cultural identity, contemporary architectural achievements, and functional and environmental requirements. In this approach, architectural identity is defined not as the reproduction of historical forms, but as a dynamic process of reinterpreting the enduring values ​​of Iranian architecture within a contemporary context.
From this perspective, a contemporary residential façade can foster a sense of familiarity and belonging in the observer only if it succeeds in channeling the plurality inherent in today’s architecture into an organized system of meaning—a system wherein new technologies and materials serve not as antitheses to cultural identity, but as instruments for its recreation and continuity.
The crisis of contemporary residential facades in Iran does not stem from the presence of plurality itself; rather, it results from an inability to transform this existing plurality into a meaningful, context-sensitive, and identity-driven diversity. Furthermore, the future of residential facades in Iran will not be determined by the dominance of a single factor, but will instead emerge from the interplay among cultural, economic, legal, environmental, and technological components within a context of architectural pluralism.