Mission Bay Block 40 is a lot & building project between I-280, Owens St., and 16th St.

The site is (maybe?) scheduled to have 2 office buildings on it each with a 5 story building attached to a 12 story building. It's supposed to be a total of 995,000 sq ft. It's being designed by Perkins+Will.

The project was supported by Mission Bay Citizens Advisory Committee and had concern from the Potrero Boosters.

There are lots of pictures of the plans & more info in this article and this article. Here is all of CurbedSF's coverage of this project.