The typical asking rate per listing is in the $20's per square foot per year. The Mission submarket is experiencing a decrease in rates. In the last 3 months, the median rate fell $10 per sqft per year. That's a 32% decrease in rent.
In the last 90 days, 16 listings have been listed, which means leases are probably leasing quickly. You'll want to be prepared to make an offer immediately. There aren't many listings below 2,000 square feet on the market, so finding a space for a small business might be tough.
The standard measurement for office space in this area is around 2,200 sqft. Most buildings in this area are approximately 2 stories. Most buildings in this region were built in 1972 and are Class B.