The basement transit crossroads in Nex serves as an anchor for the Serangoon community, with the mall being fully integrated with the air-conditioned Serangoon Bus Interchange and the Serangoon Mass Rapid Transit (MRT) Interchange Station, where the North-East Line and the Circle Line intersect. It also opens up into the civic plaza, seamlessly linking the Basement 2 (B2) transit node to the Serangoon community.

Located on the rooftop of NEX is a series of amenities and social spaces designed like a town square – a fun-filled hub incorporating a dog park, a children's playground with dry and wet interactive play equipment and Serangoon Public Library. The activities draw the community up from the B2 level, circulating through the retail levels of the mall, their movement along the external escalators and walkways animating the façade.