http://www.bizjournals.com/sanfrancisco/blog/real-estate/201... http://www.socketsite.com/archives/2016/04/san-franciscos-hu...
This is very good news, my prediction is that this wave of supply is going to reduce the prices for a while. There is actually still a lot of space in SOMA/Mission Bay/Central Waterfront to build. New construction is all going to be condos rather than single family homes, people who want to live in single family homes and drive to Costco on the weekends (nothing wrong with that) will continue to move to Seattle or Portland.
Money is flocking to SF from all over the world through VC companies and mutual funds, still. It used to be VCs with previous exits who already live in the region but in the last 2 years a lot of dumb money coming in. At some point in the next 5 years Uber, Airbnb, Pinterest, Lyft, Dropbox, Slack, Palantir and Stripe are going to have exits, even if 3 out of 8 lives up to their potentials these exits are going to create a lot of potential home buyers. Facebook, Google, Apple and Netflix (yes, netflix) are going to continue growing their empires. If SF's city officials can pull it off, with the increased investments in public transportation eventually San Francisco is going to become a global A+ city. (https://en.wikipedia.org/wiki/Global_city)
Only a 'black swan' event can stop SF's medium term growth. We already had a 'black swan' event in tech in the recent history, burst of 2000, everyone is expecting a similar story here. It's the nature of 'black swan' events that if people are already expecting things to fall apart, the magnitude is much less. (https://en.wikipedia.org/wiki/Black_swan_theory)