Due to the spatial orientation of social interactions, semi-public spaces in these buildings are unable to host residents’ interactions due to a lack of appropriate arrangements/establishment of tangible and visible objects. The influential components, however, have rarely been identified in residential complexes. Social interaction can, therefore, be improved through green space, brightness, accessibility, and furniture in common areas. Residential complexes with clustered arrangements have not performed well in creating social interaction due to the lack of defined spaces and territories for people, but multi-core, mixed, and linear complexes that define several open and semi-open spaces have been more successful in the amount of social interaction of residents.
1. Introduction
Due to urban land limitations and rapid urbanisation in developing countries in recent decades, housing support practices have failed, and housing shortages have intensified from five decades ago because of this trend. Housing authorities promoted residential complex construction in the 90s. It supported housing demand for a few years, but the initiative lost its efficiency due to an imbalance between housing supply and demand in Iran. Nevertheless, living in complexes has become increasingly common, especially in Iran’s major cities. Like past experiences in other cities, a problem associated with life in complexes is the poor quality of social interactions
[1][2], which deprives an individual of well-being
[3] and results in depression, stress, and distress
[4]. At the same time, the superiority of economic and population considerations over other human needs reduces the quality of such residential areas
[5]. A housing project, particularly a residential complex, should be able to provide security, health, and stability, as well as meet the initial needs of all ages and social groups, thereby satisfying their initial needs, such as comfort, privacy, peace, and dignity
[6]. Hence, private and semi-private territories, as a part of privacy, should also be clearly and accurately defined in designing residential areas to avoid unwanted societal conflicts between residents’ and users’ space
[5].
There are three types of territorial spaces based on privacy levels: primary, secondary, and public territory
[7]. Madanipour
[8] describes territorial behaviour as marking, controlling, and defending. Territorial behaviour is perceived as a mechanism based on enhancing human–environment interactions for regulating social interaction and ensuring stability in social organisations
[9][10][11][12]. Through signage and personalising a place, users express nonverbal communication to communicate ownership and occupancy of areas and possessions
[13]. However, based on the literature, several components contribute to territoriality, including (1) social
[14][15][16], (2) cultural
[14][17], (3) psychological–cognitive
[14], (4) physical
[14][17][18][19][20][21][22], (5) functional
[14], (6) environmental
[14][17], (7) temporal–spatial
[14][23], (8) economic
[14], and (9) individual
[23][24] components.
Research has revealed that creating territoriality can improve users’ sense of identity, privacy, and security
[25]. In addition, territoriality regulates users’ routine activities in spaces where routine activities also influence guardianship patterns and monitoring of their surroundings
[26]. As a result, creating different spaces to respond to residents’ needs must be accomplished by changing users’ routine activities, improving welfare, and increasing social interactions
[26][27]. Shared and semi-public areas in housing complexes should be designed to reinforce community encounters
[26][28] and strengthen bonds between neighbours
[29]. A large body of literature demonstrates how the place affects users’ interaction patterns in the space and users’ satisfaction
[10][29][30][31][32][33][34][35][36][37].
In metropolises in Iran and many other countries, users’ territoriality in residential complexes is not currently preserved according to residential block geometrical shapes
[35]. Adhering to building codes and building layout regulations resulted in independent parking lots, standard-dimension stairs, and appropriate fire extinguishing facilities in the latest generation of complexes, but semi-public areas decorated with green space emerged without hierarchy
[37]. These were created to be a place for users’ interactions, engagement, and social network development. However, the current levels of residents’ interactions reveal that the spaces failed to fulfil their mission in many residential complexes. It is, therefore, rare to find places where residents can gather to encourage fun and interaction. As a result, residential complexes and housing projects become a series of volumes with vacant shared spaces among them. In general, communication is an initial human need because engaging with neighbours can enhance community inclusion and a sense of belonging, especially in complexes in Iranian cities. A literature review indicates that users’ territoriality improves their engagements
[30][34][35]. Due to the lack of territoriality in many residential complexes, neighbours cannot look out for their well-being and communicate together to improve living conditions and situations, particularly between different age groups and social classes. Subsequently, a trend of social exclusion has emerged, which grows in centres with high-density buildings and crowded populations, unlike past patterns in Iran
[35].
2. Social Interactions in Built Environments
Three types of activities occur in the outdoors: necessary, optional, and sociable
[38]. Social interaction is the result of people in the same spaces and positive interpersonal interactions
[35]. Many recent environmental psychology studies focus on the interactions between the built environment and social factors. The physical aspect of a built environment facilitates interpersonal communications and provides privacy in a non-private space. It entails the establishment of appropriate dimensions, spatial arrangement, and permeability in the built environment. Finally, the human-made environment grants symbolic and aesthetic perceptions, experiences, and feelings, which affect users’ perceptions of place qualities
[39][40]. Desired privacy and spatial relations are created through appropriate spatial arrangement and the establishment of required physical elements in a place
[17][41].
In this regard, neighbourliness consists of two aspects: manifest and latent. Although communicating and chit-chatting are two common types of manifest neighbourliness, mutuality and trust among neighbours are consequences of latent neighbourliness
[35][42][43]. Hence,
Table 1 categorises the physical elements of the built environment influencing social interactions revealed in past studies. According to the findings, most scholars have identified components, such as furniture, light and brightness, accessibility, and green space.
Table 1. Physical factors influencing social interactions.
3. Territoriality and Social Interactions in Residential Complexes
Residences create a territory that matches the house’s legal boundaries
[5]. Spatial territoriality is formed based on permeability and accessibility
[30][37]. Hence, segmenting of an area results in a better perception of territorialities
[69]. Physical territoriality control involves using signs and marks to claim and protect the area. Generally, each type of activity requires certain physical settings to facilitate their occurrence in space, such as playing with others, greeting others, and talking
[70]. Passive communication is a social activity, such as eye contact, watching events, and listening to others. Common areas between houses in neighbourhoods facilitate residents’ attendance and contribution to various activities
[69].
Territories in a residential building include the arrangement of courtyards, towers, landscaping, and flooring of different areas, such as pedestrian and riding paths, along with the arrangement of sites for multipurpose activities, such as playgrounds, sports, retail, and car parking
[71]. Currently, residential complexes, which have the potential for semi-private and semi-public spaces, can play the role of local mediators (in-between spaces) to improve social interaction
[30][72][73][74]. Users perceive defined semi-public spaces as having a significant positive effect on social interactions compared with undefined semi-public spaces
[75][76]. If different levels of territory are not defined well, individuals will have to fight the environment to achieve appropriate levels of territoriality to enhance social interaction
[77]. In a residential complex, residents prefer spaces that provide interaction opportunities
[78], along with privacy, which is necessary
[35][79]. This concept indicates the importance of territoriality in improving social interactions in living places
[80]. Furthermore, previous research findings have demonstrated that opportunities for community activities and the strengthening of the social bond of residents will be increased by preparing green space in residential environments
[30][37][81] or an atrium in cold climate areas
[82].
Huang
[83] believed that water features with complex and distinct forms encourage observers’ social interactions. Configuring a proper public facility enhances informal communication and chitchat
[30][65][75][84][85]. For instance, Huang
[29] found that the concave seating arrangement near plants, closeness to the activity zone, and features of water or works of art can be among the factors that provide users with facilities, such as shade, events, and aesthetic quality, and can encourage interpersonal interaction.
According to theoretical discussion, territoriality and the segmentation of areas are two components of residential complexes that provide better insight into different territories and their control. Reynald and Moir
[86] revealed the significance of the physical and social aspects of environments in both providing and promoting opportunities for monitoring and controlling the surroundings by residents. Territories aim to satisfy the various needs of several age groups, resulting in more confidence and privacy for residents and enhancing social interactions between residents. Studies have shown that the development of green spaces through appropriate patterns, the establishment of interesting facilities and activities, and appropriate outdoor furniture arrangements enhance interaction between residents. In this regard, landscape components in open public spaces encourage informal contact and interaction.