There are 44 Bank Owned REO's that are Single Family homes in San Francisco. Click here for the list (good for 30 days from the writing of this post).
But since there are only 570 Single Family homes listed For Sale in the San Francisco MLS, that's 7.7% of all homes. As I mentioned in an earlier post, only 2.7% of Condo, Coop, Loft and TIC listings are REO's with 23 out of 949 on the market.
Of course, part of the reason is that "District 10" or the southern most San Francisco neighborhoods are the hardest hit, and they are almost entirely Single Family home neighborhoods.
For an up to date list of all REO's in San Francisco you can either keep checking back here, or visit Automated-HomeFinder.com, enter your search criteria, and be sure to use the Comments section at the site to request REO's.