Structural safety considerations for low-cost urban housing: An engineering review

Rapid urbanization in developing economies has intensified the demand for low-cost housing, often leading to compromises in structural safety and construction quality. Low-income urban housing projects are frequently executed under constraints of limited budgets, high population density, inadequate regulatory enforcement, and shortage of skilled labor. These factors collectively increase vulnerability to structural distress, progressive deterioration, and catastrophic failure, particularly in seismic, flood-prone, or geotechnically weak regions. This engineering review examines critical structural safety considerations relevant to low-cost urban housing, with emphasis on material selection, load transfer mechanisms, foundation performance, construction practices, and maintenance requirements. The review synthesizes findings from existing engineering literature, building codes, post-disaster assessments, and performance-based design studies to identify recurring causes of structural deficiencies in affordable housing stock. Particular attention is given to the role of simplified structural systems, use of locally available materials, and the implications of cost-driven design decisions on serviceability and ultimate limit states. The interaction between structural safety and non-structural components is also discussed, recognizing their contribution to overall building resilience and occupant safety. Furthermore, the paper highlights the importance of quality control, inspection regimes, and capacity building among construction stakeholders as cost-effective strategies to enhance safety outcomes. By consolidating engineering principles with practical constraints, this review aims to provide a structured understanding of how acceptable safety levels can be achieved without undermining affordability. The findings underscore that structural safety in low-cost urban housing is not solely a function of material strength or design codes, but a holistic outcome of informed planning, context-sensitive engineering, and sustained regulatory oversight. The review concludes by emphasizing the need for integrated engineering approaches that align safety objectives with socio-economic realities of urban housing delivery. Such insights are intended to assist engineers, planners, and policymakers in improving housing safety while respecting economic limitations in rapidly growing cities worldwide.