On average, listings lease in the $10's per square foot per year. The Ramona submarket is going through a decrease in rates. In the last 3 months, the median rate decreased $1 per sqft per year. That's a 4% decline in rent.
Compared to the rest of the San Diego market, the Ramona region has less expensive rates, so you should have no trouble finding a great deal in this discounted region.
In the last 90 days, 2 listings have been listed, which means new listings are probably going fast. 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 1,200 sqft. Most properties in this area are approximately 1 stories.