On average, listings lease in the $10's per square foot per year. The Balboa submarket is going through a an increase in rates. In the last 3 months, the median rate went up $16 per sqft per year.
In the last 90 days, 2 listings have been made available, which means spaces most likley are leasing quickly. You'll want to be prepared to make an offer immediately. There aren't many listings below 2,000 square feet available, so finding a space for a small business might be tough.
The standard measurement for office space in this area is around 1,780 sqft. Most buildings in this market are around 2 floors. Most buildings in this area were built in 1986.
Not much of the real estate is used for commercial space, so it might be hard to find office space. Information is the dominant industry in this market. Most of the folk of Balboa work from home. Commuting more than an hour and a half a day is the norm for those who opt to reside in this part of town.