From San Francisco:

Take I-280 South towards Daly City, exit at Eastmoor / Mission St.  At the off ramp veer to the right towards Government Center. At the stoplight will be Washington Street.  Turn right onto Washington Street, stay in the left lane.  Proceed to next stoplight which is Junipera Serra Blvd.  Cross over Junipera Serra and the next cross street is Hill Street.  Turn left onto Hill Street.  Proceed 3/4 of the way down Hill Street.  We are located on the left side of the street in a warehouse structure on the left side of the parking lot. 

From San Mateo:

Take I-280 North towards San Francisco, exit at Pacifica / Mission St.  At the split of the off ramp stay to the right towards Mission Street.  As you approach the end of the Mission Street off ramp you need to be in the left two lanes of the exit.  Make a left at the stoplight which is Junipero Serra.  Proceed north to the second stoplight which is Washington Street.  Make a right turn onto Washington Street.  Stay on the left lane. The next cross street is Hill Street. Turn left onto Hill Street.  Proceed 3/4 of the way down Hill Street.  We are located on the left side of the street in a warehouse structure on the left side of the parking lot.