Buildings reflect a society's culture, core values, and environmental context. Across northern Nigeria, major contemporary public buildings in rapidly growing urban centres like Bauchi frequently replicate generic global designs, creating a profound disconnect from indigenous traditions and local heritage. This study investigates the influence of Hausa culture on contemporary architectural identity in Bauchi, Nigeria, addressing the critical crisis of regional legibility. By systematically analysing traditional spatial layouts such as introverted courtyards, articulated entry porches (zaure), and geometric wall patterns alongside climate-friendly building methodologies, this research proposes practical strategies to seamlessly blend ancestral cultural elements with modern functional requirements in contemporary structures. Comprehensive empirical surveys and morphological spatial studies demonstrate that incorporating traditional entry pathways, private courtyards, and climate-smart passive design layouts significantly enhances both cultural identity and indoor user comfort in modern architecture. Ultimately, this paper offers a vital framework and comprehensive guide for architects shaping sustainable regional architectural identity across public and institutional projects.