The project explores modular retrofit systems for existing urban structures to mitigate the Urban Heat Island (UHI) effect in Ahmedabad. The retrofit design uses a composite of clay, fly ash, cement and construction-demolition waste to create 3D-printed modular attachments that act as thermal buffers. Micro air channels and funnel-driven airflow enhance natural cooling while preventing heat entrapment in building materials. The on-ground testing showed up to 6.7 degrees of cooling, highlighting the solution to a possible sustainable and urgent climate adaptation strategy.