Most listings are in the $30's per square foot per year. The Old Town region is seeing a a rise in rates. In the last 3 months, the median rate increased $34 per sqft per year.
Compared to the rest of the San Diego market, the Old Town submarket has smaller rates, so you should have no trouble finding a great deal in this undervalued region.
In the last 90 days, 8 listings have been made available, which means listings are probably leasing quickly. You'll want to be prepared to make an offer immediately. About 250% of the available space in the Old Town are subleases, so you might be able to sign a shorter term by taking over a previous lease. 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 1,260 sqft. Most buildings in this area are around 2 floors. Most buildings in this region were built in 1977 and are Class C.
Not much of the real estate is used for commercial space, so it might be hard to find office space. Health care is the dominant industry in this market. Commute by public transit is the most popular way to get to work amongst Old Town folk. Commuting between 30 and 45 minutes a day is the norm for those who opt to reside in this part of town.