Public theatres are important cultural landmarks and breeding grounds for artistic expression, but many suffer from rapid physical degeneration as a result of poorly applied maintenance approaches in Nigeria. Using Theatre design as a focal case, this study investigates how architectural design could serve as a proactive tool in minimizing maintenance challenges. It provides a critical analysis of design decisions, spatial organization, material specification, detailing, and site planning and the maintenance demands they create. Utilising as a primary approach a comparative analysis of existing theatres located in Lagos, Benin, and Makurdi, alongside field observations, checklist evaluations, and structured interviews, this study identifies some major design-based maintenance challenges. Research conducted shows that bad detailing, closed service zones and the use of different materials not compatible with the environmental conditions are the three main causes of rapid degradation. To overcome the above limitations, the study suggests a maintenance-oriented typological framework that encompasses- climate responsive design, durability of materials, modular building systems, and opportunistic access. The results support a design approach that fosters maintainability from the conceptual stage to sustain building life, decrease operational expenditures, and promote the ongoing cultural relevance of the national theatres. The results present a provable model for sustainable theatre design in comparable socio-environmental conditions of Nigeria.