Published in Architecturae et Artibus, vol. 19, no. 1, 2014 Parametric urban design is a potentially powerful tool for collaborative urban design processes. Rather than making one-off designs which need to be redesigned from the ground up in case of changes, parametric design tools make it possible keep the design open while at the same time allowing for a level of detailing which is high enough to facilitate an understanding of the generic qualities of proposed designs.