Ibadan Planning Journal

Level of Awareness and Practice of Sustainable Project Management among Quantity Surveyors in Ibadan, Oyo State, Nigeria

Ogunjimi Olufisayo Samuel — 2025-12-29

The construction industry has a substantial influence on environmental sustainability, social well-being, and economic development. With the rapid urbanisation of cities like Ibadan, the capital of Oyo State, Nigeria, there is a growing urgency for the implementation of sustainable construction practices. Sustainable project management entails the incorporation of
environmental, social, and economic factors throughout all stages of construction projects in order to mitigate adverse effects and maximise long-term advantages. The purpose of this paper is to explore the level of Awareness and Practice of Sustainable Project Management among Quantity Surveyors in Ibadan, Oyo State. The study adopted a quantitative approach by distributing a questionnaire to 171 professional quantity surveyors in the state. However, a total of 62 were retrieved, equating to 36% of the total administered questionnaire. The study adopted descriptive statistics using the Mean Item Score (MIS) to rank the variables. The study concluded that majority of the respondents in the study scope are aware of the concept of sustainable project management. This finding highlights a gap in local or region-specific sustainability certifications and points to a reliance on international standards. Furthermore, the study identifies "High initial investment costs" as the most significant barrier to the adoption of sustainable practices, echoing similar findings in global studies. It was recommended that public awareness campaigns be conducted to emphasise the enduring advantages of sustainable construction, including its financial and environmental benefits.

Perceived Effects of 1978 Land Use Act Provisions on Sustainable Housing Development in Lagos State, Nigeria

Ilechukwu Victor — 2025-12-29

Despite the implementation of the 1978 Land Use Act provision that assured access to land to every Nigerian, especially for housing development, the citizens are still faced with inadequate housing provision. The study examined the effects of State Ownership of Land, Governor’s Consent, Customary Rights of Occupancy, Revocation of Land Rights, and other related provisions of the 1978 Land Use Act on sustainable housing development, with focus on housing affordability and access to housing services in Lagos State, Nigeria. The study adopted a mixed research approach by employing quantitative and qualitative research methods to collect data from 271 stakeholders on the perceptions of the Act provisions, housing affordability, and access to housing services, using a simple random sampling technique. Data were analysed using descriptive tools like means, frequency, and inferential tools, especially regression analysis. The mean score perceptions of the Act provisions showed that Governor’s consent (3.66), State Land Ownership (3.55), and customary rights of occupancy (3.45) are perceived as the most discriminating. While perceived housing affordability and access to housing services mean score showed that gross deficit of housing units (4.18) and house cost increases (4.11) are the most discriminating statements. However, the regression analysis result showed that 60.9% of the overall explanation for the variations in sustainable housing development in Lagos is provided by the perceived housing-related provisions of the Land Use Act. Therefore, the study concluded that the perceived effects of the Act provisions on sustainable housing development in Lagos include a gross deficit of housing units and increasing housing costs. It is recommended then to review the identified sections of the Land Use Act in line with the perceived housing-related provisions of the Act to ensure sustainable housing development in terms of increasing housing stocks at an affordable cost.

Sustainable Urban Renewal and Green Housing Innovations: A Valuer’s Perspective on Emerging Trends in Nigerian Cities

Iruobe O. Patience — 2025-12-29

This study investigates professionals’ perspectives on the valuation of green housing features in the context of urban renewal in Benin City, Nigeria. The objective was to assess levels of awareness, adoption, willingness to pay (WTP) and perceived valuation impacts of sustainable features, as well as to identify barriers to mainstream adoption. A mixed-methods approach was employed, involving survey data from 97 professionals, which are, estate surveyors and valuers, developers, planners and policymakers, and 15 follow-up interviews. Descriptive statistics, correlation, regression and ANOVA were applied. Results indicate moderate awareness, with energy efficiency (M= 3.42) and solar systems (M = 3.05) most widely recognized. WTP analysis revealed that 59.8% of respondents believed buyers would pay premiums averaging 8.5%. Regression results showed that energy efficiency, solar systems, water management and indoor environmental quality significantly predicted valuation premiums (Adjusted R² = 0.53). ANOVA indicated significant differences across professional groups (F = 3.20, p = 0.024), with developers projecting higher premiums. Qualitative findings emphasized barriers including lack of valuation guidelines, high costs and limited policy incentives. Triangulation confirmed that energy efficiency and solar systems are regarded as the most value-enhancing features. The study concludes that green housing has measurable potential to enhance property values and
support sustainable urban renewal in Benin City. It recommends standardized valuation guidelines, fiscal incentives, consumer sensitization and professional training to mainstream adoption and strengthen sustainability integration in the housing market.

Climate Change and Vulnerabilities of Critical Infrastructure in Africa: A Systematic Review

Adeniyi Sunday Adenrele — 2025-12-29

Worldwide, climate change presents one of the most pressing challenges of the 21st century, with Africa emerging as one of the regions most exposed to its impacts. Rising temperatures, extreme weather events, sea-level rise, droughts, and flooding threaten not only ecosystems and livelihoods but also the integrity of critical infrastructure needed for socio-economic
development. This review paper examines the nexus between climate change and vulnerabilities of critical infrastructure in Africa, with a focus on key sectors such as energy, transportation, water supply, sanitation, and information and communication technologies. The review synthesizes current literature to highlight patterns of exposure and vulnerabilities across different
sectors, which underscores the need for integrated adaptation strategies or resilience. A city-scale assessment of climate change impact was carried out based on studies from Lokoja, Kogi State in Nigeria. Annually, the city experiences significant flooding events, leading to serious fatalities, the destruction of livelihoods, and damage to critical infrastructure. Ultimately, the paper argues that safeguarding Africa’s critical infrastructure against the evolving threats of climate change is essential for ensuring economic stability, public safety, and long-term sustainable development. Strategic pathways for building resilience suggested in the paper include strengthening institutional frameworks, mainstreaming climate risk assessments into infrastructure planning, enhancing local or community participation, and enhancing regional cooperation, among others

Influence of Knowledge Sharing and Collaboration on Estate Surveying and Valuation Firms' Performance in Abuja, Nigeria

Adebisi Oluwasola Stephen — 2025-12-29

This study examined the influence of knowledge sharing and collaboration on the performance of estate surveying and valuation firms in Abuja, Nigeria. It identified the various knowledge-sharing and collaboration mechanisms used by these firms, analysed their effectiveness, and the impact on the performance outcomes of the firms. To achieve these objectives, eighty-two (82) copies of the questionnaire were distributed to estate surveying and valuation firms in the study area via Google Forms, with a response rate of 85.36%. The data collected were analysed using frequency distribution tables, weighted mean scores, and correlation analysis. Results showed that direct person-to-person knowledge sharing and formal databases were the most common and effective mechanisms for knowledge sharing. IT-based tools, such as document management systems and video conferencing tools, were widely adopted; however, collaborative platforms were underutilised. The study also found that direct person-to-person sharing and formalised knowledge management significantly improve performance outcomes (r =0.284, p = 0.017) and (r =0.500, p < 0.001). Brainstorming, collaborative problem-solving, and digital communication methods also have positive effects, but to a lesser degree. The use of project reviews and Scrum meetings exhibited a complex relationship with performance (r = ?0.987, p = 0.002), being less effective in isolation but beneficial in structured contexts. The study recommends that estate surveying and valuation firms should leverage direct person-to-person knowledge sharing by organising regular face-to-face meetings, mentorship programmes, workshops, and brainstorming sessions to boost their performance.

Urban Justice and State-led Housing Policies for Low-Income Earners in Abuja, Nigeria

Obadoba Joy Oyiza — 2025-12-29

Urban justice in housing remains a central concern in contemporary urban theory, particularly in African contexts where rapid urbanisation exacerbates socio-spatial inequalities. This paper interrogates how state-led housing policies in Abuja, Nigeria, shape access to affordable housing for low-income earners through the lens of urban justice. Drawing on qualitative and quantitative data, including policy document reviews, stakeholder interviews, and household surveys, the study examines how state interventions mediate the relationship between policy intent and lived experience. Findings indicate that institutional fragmentation, bureaucratic inertia, and market-driven housing approaches undermine equitable access to housing, perpetuating spatial and economic exclusion. Despite policy rhetoric on inclusivity, state- led programmes continue to privilege middle- and upper-income groups. The paper argues for a justice-oriented framework that foregrounds distributive equity, participatory governance, and socially responsive planning in housing delivery. By situating Abuja within global debates on the “just city,” this study contributes to theoretical and empirical understandings of state power, inequality, and justice in African urban contexts.

Fire Safety Implications of Non-Compliance with Space Standards in Urban Communities

Falola Olusegun Joseph — 2025-12-29

Space standards and safety codes are stipulated to ensure that physical developments are resilient against environmental hazards like building fires; however, the effectiveness of these planning regulations hinges on strict compliance. Anchored in the theoretical frameworks of urban governance and disaster risk reduction, this study assesses the compliance of urban buildings with space standards relevant to fire safety in Ibadan, Nigeria. The study utilized a cross-sectional survey design, collecting data via structured observation checklists from 1,803 buildings selected through multistage systematic random sampling across 88 non-overlapping communities in eleven Local Government Areas (LGAs). Results indicate a critical deficit in
regulatory adherence regarding minimum “building space,” maximum “plot coverage,” and minimum “road setback”. The mean observed building separation was just 3.35m (±2.47m), creating a high risk for rapid fire propagation. Spatial analysis revealed that plot coverage was significantly higher in the high-density inner city (74.79%) compared to the outer city (70.72%). Conversely, the mean road setback was significantly higher in the inner city (7.5m) than in the outer city (5.4m). Furthermore, compliance
varied by land use; public (68.5%) and industrial (66.7%) facilities demonstrated higher adherence due to stricter institutional monitoring, whereas residential and commercial sectors largely failed to meet safety criteria. The study concludes that the prevailing disregard for space standards constitutes a "dynamic pressure" that engenders unsafe conditions, impeding emergency response and increasing community vulnerability. Consequently, the research advocates for a paradigm shift from top-down regulatory enforcement to participatory urban governance that integrates community-based risk awareness and inclusive disaster mitigation planning.

Sustainable Urban Growth: Assessing the Role of Environmental Management Policies in Ibadan, Nigeria

Oguntokun Babajide Femi — 2025-12-29

Rapid urbanisation remains one of the defining features of developing economies, particularly in sub-Saharan Africa, where cities are expanding at unprecedented rates. Nigeria exemplifies this trend, with its urban population growing by an estimated 4.3% annually. Ibadan, one of Nigeria’s oldest and largest cities, has experienced significant spatial and demographic transformation, shifting from predominantly agrarian settlements to a rapidly expanding urban centre. However, this urban growth has largely been unplanned and poorly managed, resulting in severe environmental challenges, including flooding, improper waste disposal, deforestation, and unregulated land use. This study, therefore, examined the impact of environmental management policies on sustainable urban development in Ibadan, Nigeria, with a specific focus on the effectiveness of existing policies, governance mechanisms influencing policy implementation, and the challenges and opportunities affecting policy integration into urban planning. Anchored on the Sustainable Development Theory, the study adopted a qualitative research design utilizing semi-structured interviews and document review as primary and secondary data sources. Data were analysed thematically using Braun and Clarke’s (2021) six-phase framework, drawing insights from policymakers, urban planners, environmental officers, community leaders, and representatives of non-governmental organisations. Findings revealed that although Ibadan possesses a relatively comprehensive framework of environmental management policies, such as the Oyo State Environmental Policy and the Ibadan Urban Flood Management Project (IUFMP), their implementation remains weak due to inadequate funding, limited technical capacity, poor inter-agency coordination, and weak enforcement mechanisms (Aliyu & Adeyinka, 2024; Lawal et al., 2025). Institutional fragmentation and political interference further undermine policy continuity, while insufficient community engagement and accountability structures reduce compliance and legitimacy. Despite these challenges, the study identified opportunities for progress, including donor-funded partnerships, adoption of geospatial technologies, promotion of green infrastructure, and growing national-level policy reforms that could enhance local sustainability outcomes. The study concludes that Ibadan’s urban environmental governance reflects a paradox of strong policy intent but weak implementation. Sustainable urban growth can only be achieved when environmental management policies are effectively integrated into urban planning processes through coherent governance, stable institutional frameworks, adequate funding, and participatory inclusiveness. It recommends strengthening institutional capacity, establishing a central environmental coordination mechanism to harmonize agency roles, institutionalizing GIS and environmental assessment tools in planning, and enhancing citizen participation to ensure resilient, inclusive, and sustainable urban development.

Assessing the Incidence, Characteristics and Causes of Economic Obsolescence in Residential Properties– a Case Study of Ibadan Metropolis

Adeyemo Adebola O. — 2025-12-29

The study examines the incidence, characteristics, and drivers of Economic Obsolescence (EO) in the residential property market of Ibadan, Nigeria. Economic obsolescence, unlike physical obsolescence, refers to externally induced depreciation that reduces property performance despite satisfactory physical condition. Ibadan provides a relevant case due to rising vacancy rates and declining rental values across several neighbourhoods. Guided by real estate literature, the study adopted a quantitative approach targeting Estate Surveyors and Valuers (ESVs), who are directly involved in managing and valuing residential properties. Using a non-probability convenience sampling technique, 110 structured questionnaires were administered, and 77 were duly completed, yielding a 70% response rate. The instrument captured respondents’ demographic and professional attributes, the incidence and nature of economic obsolescence in their portfolios, and their perceptions of underlying causes. Data were analysed using descriptive statistics, frequency distributions, the Relative Importance Index (RII), and the Criterion Importance Score (CIS). Inferential analysis (ANOVA and LSD post-hoc tests) was conducted to examine perceptual variations among respondents. Findings show that fewer than 20% of properties exhibit each identified EO characteristic. The most prominent characteristics include the collapse of social amenities (RII = 0.269), poor road and drainage infrastructure (RII =0.253), and oversupply of similar property types (RII = 0.247). Locational disadvantage ranked as the most critical causative factor, followed by insecurity and infrastructural decay. The study recommends coordinated urban renewal, targeted infrastructure upgrades, improved security, and responsive local regulatory frameworks to mitigate economic obsolescence and enhance sustainable housing in Ibadan.

Enhancing Holistic Health through Healing Architecture: A Literature Review

Afolami Adewale James — 2025-12-29

The environment have long been recognized to usually have health effects on occupants. The aim of this study was to undergo a thematic analysis of existing literature towards providing a more coherent understanding of the concept of healing architecture. As humans are physically, mentally and emotionally connected to the built up environment through employment, retirement, education and play. This connection fosters a dynamic life in which individuals should flourish in all spheres and actively engage in fostering their relationship with the natural world. The research method entails literature search in Google scholar online engine using “healing architecture” and “holistic health” as themes. The study concludes that the major sub-themes of healing architecture are access to view of nature, use of soft landscape in the environment, improved sound and light levels, bioclimatic design and using the building envelope for environmental control.

Gender Bias in Property Letting: Discriminatory Rental Practices Against Women in Ibadan’s Real Estate Market

Akinwale Busayo Emmanuel — 2026-01-06

Gender discrimination in home rentals is a prevalent but little-study facet of housing discrepancy in Nigerian metropolises. This research examines inequitable rental practices in contradiction of women in the Ibadan real estate market with the main objective of detecting and evaluating the reasons that lead to unfairness in tenant choice. The research, which draws from investigation statistics from a limited metropolitan districts and qualitative discussions with female tenants, landlords, and estate agents,
establishes how economic predispositions, a lack of strict implementation of laws, and severely rooted sociocultural stereotypes all work in contradiction of women who make available accommodation. Several researches have confirmed that the calibre of institutions significantly have influence on developmental outcomes, and our discoveries support the conception that in Nigeria's housing subdivision, biased practices are made worse by inadequate accountability. Also, the scrutiny highpoints by what means gender-sensitive rule design improves fairness and development results, in spite of the fact that these backgrounds keep on the edge in the authority of urban property. By contextualizing Ibadan's situation inside broader tête-à-têtes on institutional confidence and all-encompassing governance, biased tenant selection put in danger women's housing rights and social consistency. The paper concludes with strategy propositions that stress the need for robust anti-discrimination regulations, public consciousness campaigns, and gender-responsive urban housing guidelines. These observations contribute to the prevailing works on gendered admittance to real estate markets and strengthen current deliberations in Africa about impartiality, inclusive urban development, and institutional change.