The study aims to develop an evidence-based architectural framework for examining how residential spatial configuration can support voluntary everyday social encounters while preserving privacy, security and climatic comfort in the UAE. It addresses the following research questions:

RQ1. Which spatial characteristics are most consistently associated in the literature with opportunities for routine, voluntary social encounters in residential environments?

RQ2. Which socio-spatial principles of Gulf courtyard housing, particularly graduated privacy, intermediate space, climatic responsiveness and community orientation, remain relevant to contemporary residential design?

RQ3. How do contemporary vertical-housing configurations differ conceptually from courtyard and low-rise residential environments in the spatial sequence between dwelling and community?

RQ4. How can these findings be translated into a practical architectural framework for evaluating encounter opportunities in UAE residential design?

Social sustainability in housing is a broad concept concerned with the capacity of communities and built environments to support human well-being, equity, participation, social capital, safety, access and quality of life. Systematic reviews show that housing-related social sustainability spans functional, physical, perceptual, environmental and economic dimensions rather than a single design variable ([1]). Similarly, reviews of construction-sector social sustainability identify community impacts and stakeholder well-being as important but inconsistently assessed components of project performance ([7]; [12]).

For residential design, this breadth creates a methodological challenge. A project may perform well in privacy and security while providing few shared spaces; another may offer extensive communal amenities that are poorly located or rarely used. Therefore, the present study treats social interaction as one component of social sustainability rather than a complete substitute for it. This narrower focus makes it possible to examine spatial conditions in detail while acknowledging that affordability, equity, tenure, management, safety and cultural expectations also shape community life.

Recent UAE research has already established the importance of social sustainability in housing. [8] assessed social sustainability in a mass-housing neighborhood in Al Ain, while [13] examined pioneering vertical public-housing projects in Sharjah and Fujairah. Their work identified issues including mixed use, interaction, accessibility, privacy, security, living-environment quality, user needs and participation. A later study involving Emirati participants reinforced the importance of culturally responsive privacy, social integration, accessibility and resident involvement in vertical public housing ([14]). These studies provide an important base, but they also leave room for a more focused examination of the sequence of spaces through which everyday encounters become possible.

Evidence linking the built environment to social outcomes must be interpreted carefully. [4], in a systematic review of 57 studies, concluded that the built environment can support practices that prevent loneliness, particularly by enabling social interaction and belonging, but found no single built-environment element that independently explains loneliness. This supports an affordance-based interpretation: architecture can make certain actions easier or more likely without determining whether they occur.

Research at the neighborhood scale similarly points to the importance of accessible destinations, walkability, public spaces and “third places”. [16] found that neighborhood social and built environments, including third places, are relevant to older adults’ social interactions, although perceived social-environment factors were especially influential. This is useful for architectural research because it discourages physical determinism. Design can provide conditions for encounter, but social meaning emerges through use, perception, culture and repeated experience.

For this reason, the present manuscript avoids using loneliness as a direct architectural outcome. Instead, it uses the more defensible concept of encounter opportunity: the spatial possibility for residents to see, recognize, greet, pause with or briefly interact with others during normal daily routines. Such encounters may be modest, but repeated weak ties can contribute to familiarity and neighborhood belonging.

High-rise living reorganizes social space vertically. Movement that might occur through a front yard, shaded lane, courtyard edge or neighborhood street can be transferred to internal corridors, lift lobbies, elevators, podiums, parking levels and controlled entrances. These spaces are often designed primarily for circulation, fire safety, access control and efficiency. Their social role may therefore be incidental rather than intentional.

[9] demonstrated that spatial configuration and the use of community facilities are relevant to interaction patterns in housing complexes. [10] reported that spontaneous interaction in high-rise housing often occurs in common spaces close to the home and building, including corridors, lift lobbies and front yards. A subsequent study by [11] focused specifically on indoor communal-space layout and showed why circulation and destination spaces should be analyzed together. The implication is not that corridors should become lounges, but that the geometry, visibility, width, adjacency and connection of everyday routes can influence whether residents merely pass through or have reasonable opportunities to pause and recognize others.

UAE vertical public-housing research reaches a related conclusion from a local perspective. [13] found limitations in social interaction and communal opportunities in two pioneering vertical public-housing designs while also recognizing achievements in privacy, security and responsiveness to Emirati family needs. The central design problem is therefore a balance problem: increasing social opportunity without producing unwanted exposure, noise, surveillance or loss of domestic privacy.

The courtyard house is important in Gulf architectural history because it integrated climatic adaptation and socio-cultural organization. The courtyard acted as an internal open space, while spatial layering helped regulate privacy, hospitality, family activity and movement. Recent analysis of vernacular courtyard houses across the Arabian Gulf emphasizes the relationship among spatial form, socio-cultural factors and systems of activity ([2]).

Privacy in this context should not be understood as social isolation. Traditional domestic organization often separated guest reception from intimate family areas while still allowing social life to occur in controlled spaces. Intermediate elements and gradual transitions helped distinguish household, guest, neighborhood and public domains. This is conceptually relevant to contemporary multi-family housing because vertical buildings also require transitions between the dwelling and the wider community. The question is whether those transitions are spatially rich enough to support both privacy and optional encounter.

The courtyard itself should also not be romanticized. Historic forms reflected different household structures, gender norms, mobility patterns, technologies and climatic practices. Direct replication would be inappropriate. The transferable lesson is the use of layered thresholds, shaded intermediate spaces, legible social domains and environmental comfort to support a range of degrees of contact.

Social-scale transfer boundary. A traditional household courtyard or majlis chiefly mediates the relations of family members and invited guests; that intrahousehold/host-guest function cannot, by itself, demonstrate encounters among neighboring households. What can be transferred is the spatial principle of graded, privacy-preserving thresholds and climatically usable places to transition or pause. An inter-household opportunity arises only when these characteristics are located on spaces genuinely shared by separately occupied dwellings, with lawful common access, appropriate screening and resident choice. Therefore, a private courtyard is not counted as a neighborhood encounter destination, and a communal atrium, podium or sky garden is not assumed to work socially without confirming these conditions ([2]; [13]).

The topic aligns with current UAE planning priorities. Dubai Social Agenda 33 includes cohesive families, quality of life, housing, identity and social cohesion among its central concerns ([15]). The Dubai 2040 Urban Master Plan emphasizes vibrant and healthy communities, parks and open space, people-centered accessibility and protection of heritage and culturally significant places ([5]). These policy directions create a strong rationale for examining residential social infrastructure at the scale of buildings and neighborhoods.

Recent public initiatives also demonstrate continued attention to community gathering space. Community neighborhood councils and majalis have been advanced as settings for social cohesion, while 2026 initiatives include community spaces intended to strengthen interaction among neighborhood residents ([6]). Architectural research can complement such policy initiatives by asking how ordinary daily residential circulation—not only dedicated community buildings—can contribute to social connection.

This study uses a targeted narrative review and comparative conceptual analysis; it is not a systematic or scoping review. This design was selected because the research question concerns the integration of several bodies of knowledge—social sustainability, high-rise communal space, Gulf residential culture, privacy, and UAE housing policy—rather than the pooled statistical effect of a single intervention. No laboratory testing, resident survey, interview, or experimental manipulation was undertaken.

The review gives priority to peer-reviewed research published from 2022 to 2026 and uses earlier foundational sources only where necessary to clarify established concepts. Literature was identified through targeted searching and citation-led selection on academic publisher platforms, university research repositories, and scholarly indexes using combinations of terms including social sustainability, housing, residential architecture, high-rise housing, vertical housing, communal space, social interaction, courtyard house, privacy, Arabian Gulf, UAE, Emirati public housing, and built environment loneliness. Official UAE and Dubai sources were used only for policy context.

Review-source identification and search transparency. The historical review used selective searches of academic-publisher websites and university research repositories and citation-following, but a contemporaneous list of search interfaces, dated queries and retrieved records was not retained. It is consequently not possible to identify a particular scholarly index, such as Scopus or Web of Science, as having been searched systematically, or to provide an auditable count of retrieved/excluded records. Publisher platforms identifiable from the cited primary works include MDPI (Social Sciences, Buildings, Heritage, Land), Springer Nature (Journal of Housing and the Built Environment), and Taylor & Francis (Cities & Health; Urban Policy and Research); the UAE University research publication repository provides an additional record for the UAE housing comparator. These are verified publication/access platforms, not a reconstructed search history. A representative, reproducible targeted query for the subject area is: (“vertical housing” OR “high-rise housing” OR “courtyard housing”) AND (“social interaction” OR “social sustainability”) AND (privacy OR “communal space”) AND (UAE OR “Arabian Gulf”). It is supplied as an illustrative search strategy rather than falsely presented as a preserved historical query. The synthesis remains selective rather than systematic.

Sources were included when they contributed directly to at least one of four analytical domains: (a) social sustainability in housing or construction; (b) spatial conditions for social interaction in multi-family or high-rise housing; (c) Gulf courtyard-house spatial culture, privacy, or hospitality; and (d) UAE residential transition or planning priorities. Sources focused solely on structural engineering, energy performance, materials, or unrelated clinical outcomes were excluded from the conceptual synthesis.

The author has lived and worked in the Arabian Gulf region for more than four decades, with professional experience related to architecture, construction and the built environment. This long-term regional familiarity provides contextual awareness of changes in residential form, privacy, climatic adaptation and community space. It is not treated as empirical evidence in this study; the analytical claims and the proposed ESEO framework are based on the published literature and policy sources included in the review.

The cited sources were interpreted against the research questions and compared for their discussion of privacy, routine movement, intermediate space, visibility, thermal usability, and shared destinations. The resulting six domains are an author-proposed organizing scheme, not the output of a reproducible coding procedure. This was an author-led conceptual synthesis, not a preregistered or independently replicated coding exercise. No database export, full screening log, inter-coder agreement assessment, or exhaustive search record is available. Consequently, the six categories should be interpreted as provisional design-review propositions rather than systematically derived or empirically validated constructs.

Rationale and boundaries of the six ESEO domains. The proposed domains separate six architectural questions across the dwelling-to-community journey: (1) who controls access and exposure (privacy), (2) whether ordinary routes produce possible co-presence (circulation), (3) where stopping or transition is usable and permitted (intermediate space), (4) whether community activity can be seen without revealing domestic interiors (visibility), (5) whether the route is usable under relevant climatic conditions (thermal continuity), and (6) which accessible activity generates repeated journeys (shared destinations). Circulation refers to route configuration and possible co-presence, even without a place to stop; intermediate space requires an identifiable and functionally usable pause/threshold area; a destination requires an accessible activity or facility that motivates use, whether or not it adjoins the circulation route. One location may serve multiple functions, but evidence of a corridor does not establish a usable intermediate space, and the presence of a room does not establish a shared destination without access and use conditions. The distinctions are explicit provisional coding rules, not validated independent constructs.

The framework is intentionally non-clinical. It does not assign a loneliness score and does not claim to predict friendship, cohesion, or mental health. It assesses whether architecture provides voluntary opportunities for everyday encounter. This distinction protects the analysis from causal overstatement and makes the framework suitable for plan review, comparative case analysis, and early design evaluation.

Evidence-to-domain traceability and reproducibility boundary. Table 1 identifies the source-level conceptual precedents and the remaining evidentiary gap for each ESEO domain. These mappings identify overlaps and candidate distinctions; they do not demonstrate that any domain is unique, that the review was exhaustive, or that a specific spatial feature causes social interaction. The framework remains a proposition requiring transparent application and external testing.

Table 1. Preliminary source-to-domain traceability and evidentiary limitations.

The most important conceptual difference identified in the synthesis concerns the sequence between dwelling and neighborhood. In courtyard and low-rise settings, movement may pass through several spatial layers before reaching the fully public realm. In vertical housing, the same transition can be compressed into a dwelling door, internal corridor, lift lobby, elevator, entrance lobby, parking area, and vehicle. Compression is not inherently negative; it can improve security, accessibility, land efficiency, and climatic protection. However, it can reduce the number and diversity of places in which optional, low-pressure encounters can occur.

The transition-sequence comparison is summarized in Table 2.

Table 2. Conceptual comparison of residential transition sequences.

The literature consistently indicates that social opportunity should not be created by eliminating privacy. Gulf courtyard-house research demonstrates the importance of spatial gradation and culturally meaningful separation, while UAE vertical-housing studies show that residents value privacy and functional separation within contemporary units ([2]; [14]). The design implication is to create a sequence of domains rather than a binary private/public boundary. A successful shared space should allow residents to choose whether to participate, pass through, observe, or withdraw.

Circulation spaces are unavoidable and therefore have high potential as everyday encounter settings. Research on high-rise housing identifies corridors, lift lobbies, and building entrances as locations where spontaneous contact occurs ([10]). Their social usefulness depends on more than floor area. Long, narrow, visually monotonous corridors may function efficiently while offering little reason to pause. By contrast, daylight, short visual distances, small widening points, seating near but not within the movement path, and connection to shared functions can turn circulation into a more humane transitional environment.

Intermediate space is the central bridge between the courtyard precedent and vertical housing. In traditional settings, semi-private and semi-public layers helped negotiate privacy, hospitality, climate, and neighborhood life. In contemporary buildings, equivalent roles may be performed by entrance alcoves, shared terraces, sky gardens, floor-level common rooms, shaded podium spaces, or small seating areas associated with lifts and stairs. The important characteristic is not the label of the space but its position between private dwelling and fully public realm.

Visual connection can support recognition and informal awareness, but excessive visibility can undermine privacy. The ESEO approach therefore distinguishes visibility from exposure. Windows or openings toward shared spaces, transparent but screened lobbies, overlooking of children’s play areas, and visually connected vertical gardens may support awareness of community activity. However, direct views into private interiors or unavoidable social surveillance should be avoided. This principle is particularly relevant in the UAE, where privacy remains an important cultural and residential design requirement.

In hot-arid environments, social opportunity cannot be separated from thermal comfort. A theoretically walkable route may have little practical social value if it is exposed to intense heat for much of the year. The courtyard tradition linked social space with shade and environmental moderation. Contemporary equivalents include continuous shaded walkways, arcades, cooled or tempered transition zones, tree cover, protected crossings, and short walking distances between residential entrances and daily destinations. Dubai’s current planning emphasis on people-centered accessibility and connected communities reinforces the relevance of this principle ([5]).

Peer-reviewed local evidence qualifies this climatic argument. [3] examined district-level outdoor thermal comfort in Abu Dhabi and Al Ain through measurements and ENVI-met scenarios combining shading structures and vegetation. Their selected fully shaded scenario reduced the reported predicted mean vote (PMV) at 14:00 relative to baseline by approximately 1.0 in Abu Dhabi and 0.7 in Al Ain; however, simulated PMV remained above 4 during peak hot hours in the study, signalling severe discomfort rather than acceptable outdoor conditions. The study also found that coastal humidity and inland-coastal microclimate differences affected relative intervention performance. Its findings concern two district configurations, not the residential routes of the projects evaluated here. Consequently, a shaded route in ESEO is an architectural candidate requiring time-specific heat, humidity, wind, radiant-exposure and local comfort evidence, not proof that a route is thermally comfortable or that social encounters will occur ([3]).

Shared destinations create reasons for repeated presence. International literature on third places and neighborhood interaction suggests that accessible everyday destinations can support social contact ([16]). Within residential developments, destinations may include children’s play areas, small gardens, multipurpose rooms, prayer facilities, seating areas, local retail, mail or delivery zones, and community rooms. Their location matters: a rarely visited amenity at the edge of a development may create fewer routine encounters than a modest shared function placed along an everyday path.

To prevent a favorable design description from being mistaken for a verified encounter opportunity, each ESEO domain requires a traceable architectural observation. Reviewers should document the plan, section, photograph or access rule supporting the observation, identify missing evidence, and record whether an apparent opportunity is negated by privacy, access or thermal constraints. An absent drawing is coded as insufficient evidence, not as absence of the feature. These rules are proposed for subsequent application; they have not been tested for inter-rater reliability.

The minimum evidence requirements and disconfirming observations are summarized in Table 4.

Table 4. Evidence sufficiency and disconfirming conditions for the six ESEO domains.

Decision rule: no overall ESEO grade is assigned when a domain lacks adequate documentation. Evidence of one favorable feature cannot cancel a demonstrated privacy or access failure elsewhere. The proposed disconfirming conditions are methodological safeguards, not empirically calibrated thresholds. A future case study must report domain-by-domain observations, counterexamples and disagreements before claiming repeatability.

This bounded comparison uses published descriptions of Diba Al Hosn and Al Ghurfa in [13], rather than independent access to verified construction drawings or residents. It tests what the proposed ESEO protocol can and cannot determine from the published record; it is not a validation study, a field evaluation, or evidence of residents’ actual encounters.

The 2023 comparator already evaluated both UAE projects against eight social-sustainability aspects, including social interaction, accessibility, security, privacy, and quality of living environment. Therefore, identifying absent or limited communal facilities is not an original ESEO finding. ESEO can only claim an additional diagnostic contribution if it yields a distinct, traceable judgment under a defined privacy-encounter-climate rule.

For Diba Al Hosn and Al Ghurfa, the available published descriptions indicate differences in ground-floor functions and shared amenities. They do not, on their own, document every threshold, line of sight, pedestrian exposure, climatic condition, or resident use pattern required for a complete six-domain ESEO assessment. The appropriate ESEO output is consequently “partially assessable; remaining domains indeterminate,” not a numerical rating or a positive/negative conclusion.

Project-specific findings from the published source. [13]ure[13] report that Diba Al Hosn has two ground-level entrances, a waiting area, shops, parking and services, whereas Al Ghurfa contains parking, an entrance lobby and services but lacks ground-floor mixed-use areas ([13]). The reported shops at Diba Al Hosn establish a potential on-site activity destination (Domain 6), whereas no corresponding commercial ground-floor function is documented for Al Ghurfa. These observations do not verify that shops are open, accessible to all residents, linked to usual pedestrian routes, or socially used. The authors also describe privacy-related spatial provisions in both schemes, which support discussion of Domain 1 at household level but do not fully establish privacy-controlled inter-household transitions. Both projects contain circulation/lobby arrangements, but the existence of a lobby alone cannot establish Domain 2 encounter-supportive pause opportunities. The earlier study reports limited or absent recreational and dedicated social functions in the projects; this identifies potential limitations to Domains 3 and 6, rather than establishing actual resident behavior. The precise evidence boundaries are itemised in Table 5.

Table 5. ESEO domain-by-domain assessment of documentary evidence for the two UAE schemes, based on the externally published Fig. 3 and Fig. 5 and Table 4 of [13]. Documentary status does not imply measured social performance.

Source: [13], Social Sciences, 12(9), 513, https://doi.org/10.3390/socsci12090513. The publisher’s article includes floor-plan figures and a project-comparison table; no numerical ESEO scores have been derived here.

Incremental-evidence result: the published case comparison confirms that ESEO can structure missing-evidence requests, but it does not demonstrate superior diagnostic performance over [13]. A defensible future test requires the same independently documented drawings to be evaluated with both frameworks, predefined decision rules, blinded raters, disagreement reporting, and an explicit analysis of whether ESEO identifies consequential distinctions absent from the comparator.

The synthesis suggests that socially responsive housing should not maximize interaction indiscriminately. Residents differ in age, family structure, culture, work schedule, personality, and desired level of contact. A socially sustainable building therefore needs both connection and retreat. The most useful design objective is optionality: residents should encounter others naturally during ordinary routines but retain the ability to withdraw without penalty. This principle aligns well with Gulf traditions of layered privacy and hospitality.

One of the risks in discussions of vernacular architecture is formal imitation. The social value of the courtyard does not depend only on a rectangular open space surrounded by rooms. Its deeper contribution lies in centrality, shade, visual connection, controlled access, multi-purpose use, and mediation between private rooms. These properties can be reinterpreted vertically through atria, sky courts, shared terraces, clustered floor plans, shaded podiums, or vertically distributed gardens. The research implication is to compare functions and spatial relationships rather than architectural appearance.

Many high-rise developments concentrate communal amenities at ground or podium level. The literature suggests that proximity to the dwelling matters for spontaneous encounter. A socially responsive vertical building may therefore need a distributed hierarchy of shared spaces: small floor- or cluster-level spaces close to homes, larger building-level spaces, and neighborhood-level destinations. This creates a vertical equivalent of the graduated social hierarchy found in horizontal neighborhoods.

The framework also has implications for construction and development practice. Social sustainability is often considered late, after density, unit yield, parking, structure, services, and cost have already fixed the spatial organization. Incorporating ESEO domains during briefing and concept design would allow project teams to test social performance alongside technical requirements. This does not necessarily require expensive amenities. Small changes in circulation geometry, threshold depth, shade continuity, seating placement, stair visibility, and the location of shared functions may have significant spatial effects without major increases in built area.

For housing authorities and developers, the framework can function as a design-review checklist. For architects, it can support option comparison. For facility managers, it can identify spaces that need management or programming rather than physical reconstruction. For researchers, it offers a set of observable variables that can later be tested against resident perceptions and behavior.

Distinction from prior UAE housing assessments. Existing UAE housing studies have evaluated social sustainability, resident requirements, privacy, accessibility, and the performance of particular public-housing schemes. The narrower proposed contribution here is to organize the dwelling-to-community transition as an auditable sequence of spatial opportunities for voluntary encounter, while treating privacy and climatic usability as necessary constraints rather than benefits that can be traded against social exposure. This is a conceptual distinction, not evidence that ESEO outperforms existing frameworks. A direct comparative application using published plans, independently coded indicators, and agreement between assessors is still needed to establish its practical incremental value.

Direct comparison with [11]. Nguyen and colleagues combined floor-plan/space-syntax analysis with resident interviews in four high-rise complexes in Hanoi, identifying the importance of accessibility, visibility, flexibility, corridors, and transitional spaces for social interaction. Accordingly, ESEO cannot claim these spatial relationships or their assessment as original discoveries. Its distinct proposal is a privacy- and climate-constrained screening protocol for potential voluntary encounters in UAE housing, not a demonstrated predictor of residents’ behaviour. Unlike the empirical Nguyen study, ESEO has not tested associations with observed interactions. The proposed protocol is therefore a conceptual design-audit instrument requiring future comparative application, inter-rater assessment, and resident-level validation.

Prior UAE studies have already advanced social-sustainability principles and examined resident perspectives on vertical public housing ([8]; [13]). ESEO therefore does not claim novelty in privacy, circulation, intermediate space, visibility, climatic comfort, or shared amenities considered separately. Its narrower proposed contribution is a spatially inspectable, non-compensatory sequence of questions about voluntary encounter opportunity: whether routine routes expose residents to usable shared settings, whether these settings remain climatically viable, and whether participation is possible without sacrificing privacy. This is a conceptual proposition, not an empirically established superiority claim.

For application, reviewers should examine drawings, circulation paths, thresholds, shaded connections, access rules and amenity distribution together, and record a short evidence statement for each domain. A missing domain should not be silently compensated by an unrelated amenity. No numerical weighting, score, threshold or causal effect is asserted. Agreement between independent assessors and association with observed encounters remain questions for future validation.

The contribution and its novelty boundaries relative to previous UAE housing studies are compared in Table 6.

Table 6. Comparison of prior UAE housing research and the narrower ESEO proposal.

A prospective design-review application can follow four steps: (1) define the dwelling-to-shared-destination journey and the residential population for which access is assessed; (2) annotate six domain-specific conditions on plans and sections; (3) record for each condition whether the documentation supports, contradicts, or cannot establish the proposed opportunity, with a drawing or source reference; and (4) compare alternative schemes narratively, highlighting privacy and climate trade-offs rather than collapsing them into an unvalidated total score. This protocol is proposed for future testing; it has not been applied as a documented empirical study in this article.

The closest UAE comparators provide substantial prior work rather than an empty research gap: [13] proposed social-sustainability indicators for vertical public housing; [14] tested resident-informed priorities using interviews and digital participation; and [8] assessed neighborhood-scale indicators with design and spatial analyses. The present ESEO contribution is consequently limited to a proposed, non-compensatory building-scale audit of opportunities for voluntary encounter. The framework has not yet been shown to yield more informative or reproducible decisions than these existing approaches. A full reference-by-reference metadata audit and independent application to common floor plans remain future work; neither has been represented here as completed.