The Master Plan of Rosemont District in Regina (Saskatchewan, Canada) has been designed by Sebastien Goethals, Mitchell Reardon, Daly Brown and Atsushi Hagihara. The project has won the 1^st Prize of the Rosemont 2040 “Morph My City” international competition. The master plan aims to densify and intensify a suburban residential district of Northern America through an integrated and incremental approach of urbanism. The smooth densification of the area is accompanied by an increase of quality green spaces, pedestrian green paths going through the district and multimodal transport hubs (bus corridors, Bike&Ride) at the scale of the district. A mobility plan is developed for each mode of transport. Ecological corridors passing through residential and mixed-used areas allow a better preservation of ecosystems and a smarter water management. The « Green Heart » at the centre of the neighbourhood is a multifunctional park dedicated to sustainable mobility, urban agriculture, education and social cohesion.