Available immediately is approximately 1000 square feet of open space (probably slightly larger). This space can be rented in partitions or as a whole. It can easily accommodate a group of 8-10 people.

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Large Prof Office Space (dsl, utils incl) (mission district) $2100 1000sqft

Currently available are several offices, upstairs and down, located at Bunker Studios, a professional shared space. Prices range from $350 to $450 to $550. Several spaces can easily accommodate two people if you’d like to share w/ a friend or colleague. Creative environment filled with designers, writers, programmers, and other artistic people.

More here:
Private Offices in Prof Group Space (dsl, utils incl) (mission district) $450 125sqft