GDP and continuous growth as a measure of development is a capitalist construct which is no longer compatible with the challenges of climate change and social inequality we face. Progressive societies are starting to value measures of happiness and well-being as the alternative measure of success. This projects imagines a new Ministry of Happiness and Wellbeing for London, in one of the most prominent of locations, the Serpentine Lake, which signifies the importance of which a progressive new future society might hold such values.