Everybody wants to live a good and happy life. A well-planned, well-run city can make people happier. To a degree, city-making is related to human happiness. Urban happiness has been argued to promote joy, health, freedom, resilience, equality, and social connections, among others. Under the umbrella idea of happiness, this community will integrate various areas of urban discourses and practices. Four thematic investigations such as healthy city, stimulating city, smart city and just city will encompass diverse layers of urban knowledge and technology and tackle emerging issues in the practices of spatial planning and sustainable development.