The definition of a contemporary public infrastructure in NYC has been largely challenged by the increasingly transient, fast-paced urban sprawl. Instead of the traditional uniform, static, and formal public infrastructure as a product of gentrification that lacks flexibility and cultural-specificity, Cloud Post explores a new form of public infrastructure that preserves the vitality of the informal and dynamic aspects of the neighborhood. Cloud Post is a rooftop deck pavilion system that extends the vitality of the informal streetscape upwards through a modular, minimal, and adaptable structure inspired by the typologies of street sheds below. Socially, the ‘Cloud’ serves as a new type of ‘post stand’ that is casual, accessible as a communication web for the city. Environmentally, the ‘Cloud’ also features a scalloping canopy that operates and collects rainwater feeding a hidden garden at the back. The modular system with vertical partitions as an extension of the scalloped roof serves as flexible dividers to accommodate different scales of activities. Ultimately, the ‘Cloud Post’ creates a new social typology that can parasite on the site to become unique icons of the neighborhood to advocate and strengthen the immigrant community bond.