It really depends on the time of day that you leave in both the morning and evening. From 6:00am-9:00am, it's probably about a 40 minute commute. If you're allowed to start work at 9:30 or 10:00, you'll be able to shave 10-15 minutes off that commute. Evenings are worse, and between 4:30pm-7:30pm, it's probably going to be 45-60 minutes in the evening. Before 4:30 or after 7:30, it will probably be about 15 minutes less. And if you don't have parking in the Presidio, you'll need to potentially factor in looking for parking as well.
Hope this helps.
Co-Founder & CEO
"Automation of the entire real estate process"