It describes what a Fire NOC is (issued by Delhi Fire Service or DFS), why it is necessary, which buildings require it, required documents, process steps, typical timelines (20–30 working days), validity periods (3–5 years depending on building type), and the consequences of non-compliance. The page aims to guide residential developers, businesses, hotels, factories and other establishments in Delhi through a smooth, end-to-end NOC application and compliance process.