Ever wondered, how Intranets are built? Our experiences show that many customers often have similar requirements when it comes to an Intranet Portal. In this presentation we share our ideas and best practices about building an Intranet package consisted of the most frequently used components and the benefits it brings. We also discuss, how you can harness the power of React, TypeScript and Office UI Fabric to build robust, powerful and responsive client-side web parts that can be easily integrated and deployed to both SharePoint On-Premise and Online tenants. Lastly, we concentrate on what it takes to build such Intranet with all its applications, intuitive and device independent design, as well as integration of social components to boost user adoption.