Abstract
This study investigates the role of Interlocking Stabilized Soil Blocks (ISSB) as a sustainable building material in the design of a Yoruba Cultural Museum in Ibadan, Nigeria. The research explores the environmental, economic, structural, and cultural implications of adopting ISSB for institutional architecture. Through qualitative, document-based analysis of existing literature, case studies, and contextual evaluation, the study examines ISSB’s thermal performance, cost efficiency, structural reliability, and aesthetic potential. Findings indicate that ISSB contributes to environmental sustainability through reduced cement usage, local material sourcing, and thermal mass regulation, which enhances indoor climate responsiveness. Economically, ISSB offers cost advantages, reduced construction time, and improved long-term durability compared to conventional sandcrete blocks. Structurally, the interlocking mechanism supports stability and adaptability for larger institutional spans when integrated with reinforced systems. Beyond technical performance, ISSB demonstrates strong cultural and symbolic resonance, bridging Yoruba vernacular traditions with contemporary architectural expression. The study concludes that ISSB is a viable, sustainable, and culturally expressive material for museum-scale architecture in Ibadan. Recommendations include integrating passive environmental strategies, reinforced structural systems, and cultural design considerations to maximize both functional and symbolic performance. The research contributes to advancing sustainable material practices and heritage-based architectural strategies in Nigerian institutional design.