Most listings are in the $10's per square foot per year. The Lemon Grove submarket is going through a an increase in rates. In the last 3 months, the median rate rose $14 per sqft per year.
Compared to the rest of the San Diego market, the Lemon Grove submarket has lower rates, so you should have no trouble finding a great deal in this undervalued submarket.
In the last 90 days, 2 listings have been posted online, which means spaces might be leasing quickly. You'll want to be prepared to tour spaces as quick as possible. 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 410 sqft. Most buildings in this market are close to 2 stories. Most buildings in this region were built in 1985 and are Class Class C.