The typical asking rate per listing is in the $10's per square foot per year. The Lemon Grove submarket is experiencing a an increase in rates. In the last 3 months, the median rate increased $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 listed, which means new availabilities are probably going fast. 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 410 sqft. Most buildings in this region are approximately 2 stories. Most buildings in this area were built in 1985 and are Class Class C.