Arden by Bosa is a planned building project on Long Bridge Street in Mission Bay. It will be 2 fancy residential towers that will have 267 condos (mostly 2BRs).
In an article about the project, CurbedSF writes: "Arden is the third project in the neighborhood by Bosa Development, following Radiance in 2008 and Madrone, which opened in 2011."
CurbedSF has written a number of pieces about this building.