San Francisco executive suites and fully furnished turnkey flexible office space for lease in the Spear Tower on Market Street, Suite 3600, San Francisco, California 94105. This downtown San Francisco business center in this landmark building totals 39,242sq.ft, offering ready to go executive suites, temporary office space for rent, virtual offices, mailing addresses and office space for lease on flexible terms. Situated at the most prominent address in downtown San Francisco, the center offers spectacular views of the bay and city skyline. The 42-story building boasts a spacious interior, striking marble lobby and monumental pavilion.