Empirical Assessment of Climate-Responsive Design in Contemporary Residential Architecture in Cross River State

The equatorial tropical climate of Cross River State presents specific design challenges of high humidity, intense rainfall, solar radiation, and year-round warmth that demand purposeful climate-responsive architectural strategies in residential design. This study empirically assesses the extent and effectiveness of climate-responsive design strategies in contemporary residential buildings constructed between 2015 and 2024 in Calabar and surrounding urbanising communities. A stratified random sample of forty-five residential buildings was selected across low, medium, and high-income residential typologies. Each building was assessed for the application of eleven climate-responsive design attributes including natural ventilation configuration, sun path orientation, shading device provision, roof overhang depth, thermal mass strategy, vegetation integration, rainwater management, floor-to-ceiling heights, and cross-ventilation potential. Thermal performance was measured through a three-week indoor environmental monitoring programme using data loggers measuring temperature, humidity, and globe temperature at two-hourly intervals. Adaptive comfort analysis related monitored conditions to occupant-reported thermal comfort. Results indicate a significant decline in climate-responsive design attributes in medium and high-income contemporary housing compared to older housing stock of the same typology. The most commonly absent attributes in contemporary buildings are adequate cross-ventilation provision (absent in sixty-six percent), deep roof overhangs (absent in seventy-one percent), and operable external shading devices (absent in eighty-two percent). Buildings with three or more climate-responsive attributes showed indoor conditions within the adaptive comfort zone for sixty-three percent more monitored hours than buildings with one or no such attributes. The study proposes a climate-responsive design performance requirement for the Cross River State residential building code. Keywords: climate-responsive design, residential architecture, Cross River State, thermal comfort, tropical climate.